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Comments: Good comfortable string with good feel. But since it is soft, you don't expect it to generate as
much spin as a poly. The "problem" is its playability drops off after 5-6 hours of play if you hit hard. It is not breaking nor
fraying yet but you begin to feel it is going dead. So it may not be much cheaper than gut, if you compare its usable life.
Might be better as a hybrid on the crosses.
From: Mark, 11/15
Comments: Strung my RF97 with Biphase 17g on the mains at 59 lbs, Babolat RPM Blast 18g on the crosses.
Great feel but for the hard hitters, the string lasted an average of 2.5 to 3 hours of play. Great for people seeking for good
feel and playability.
From: Elton, 6/15
Comments: Using it on my second Prince 100 Tour (18x20) strung at 56 lbs. The other 100 Tour was strung
the X-one Biphase 18 (also at 56 lbs) which I wrote a short review on it's respective page. Similar to the 18, ball pocketing
and spin is obtained more from techniques. The power level is a little less compared to the 18, which is expected. The feel
crisp however, is much less apparent in this 17. It is a good string no doubt. However, for me using the 100 Tour with flex
below 58 and the feel everyone described as "mushy/soft/different" lack of crispness could be a deal breaker at this price
There are many others multis that can give the similar results. If you are not a string breaker, I highly recommend the 18,
firmer racquet may reap more benefits out of this 17.
From: GW, 2/15
Comments: Best hybrid I have used so far. Strung in a Wilson Pro Staff Six.One 90 on the mains at 51 lbs and
Babolat RPM Blast 18g at 47 lbs on the cross. Good for the arm, great ball pop great overall playability. I observed a great
playbility if you use it on the cross due to significant loss of snap back. String set combination lasted 8 hours of play before
mains started showing signs of wear and dynamic tension starts dropping significantly. String broke after 12 hours of play.
stinging my other racquets at different tensions to suit different conditions. Will be sticking to this product from here on
From: Elton, 1/15
Comments: I recently purchased a stringer and a reel of this string for my 11 year old son. I cut out the RPM
to do a practice stringing in my Aeropro Drive with this string. I was amazed by how much I improved. My serve especially,
slice, or flat down the T out wide. I felt like a major league pitcher with a mastery of all the pitches. Net play is fantastic. If
are Nadal and need or want to hit 50 groundstrokes per rally from the baseline, this might not be the string for you.
you are an all court player who is looking for variety, playability, and consistency? This is your string. Added benefit -- it is
easy on the arm.
From: Eric, 7/14
Comments: I'm nearing 60 (years not string tension) and playing singles three times a week at the 3.5-4.0
This is s great string for saving your arm and shoulder and living to fight another day. This string frays quickly but keeps its
tension for a while before breaking. Although the 17 gauge is a bit less durable, it does provide more spin and control than
gauge.. The string is a bit pricey, but it's a lot cheaper than physical therapy or surgery. I kept decreasing the tension until
at 52 lbs in my arm-friendly ProKennex 7G.
From: Joe, 7/14
Comments: Using this in my Youtek Radical MP which is a low powered racquet. Strung at 57 lbs. I generate a
to medium swing speed. I noticed a little more pop all around on my strokes. Felt really good on shoulder and arm after
subsequent hitting sessions. Good string.
From: JJ, 6/14
Comments: I play with the Volkl Organix 8 (300g) and so far I've strung it with Prince Beast, Technifibre Black
Red Code, and RPM Blast. I strung this with a hybrid of BlackCode (52lbs) and Biphase (55 lbs) and it plays incredible. I do
the Prince Beast/Biphase combo might be better and I will try it next time. But, I will no longer be using VS Natural gut as
softer string with a poly after using this string! So soft and much crisper than natural gut!
From: Andrei, 9/13
Comments: I had this strung on a K 6.1 Tour leaded up at 55lbs. It plays quite well, the feeling was crisp, but
boardy, I had some ball cupping/pocketing, and it is very comfortable. Spin generation was adequate, I cannot comment
durability as I only did some drills, and played 2 sets of doubles. As usual, if you are a mega top spinner, durability will be a
I figure this could be good for people with arm/elbow/shoulder issue, or over 40 years of age (please don't be offended). It
cheaper to pay for string and labour, rather than seeing a doctor. My NTRP is a 5.0
From: Christopher, 7/13
Comments: These feel very good and feel soft, are easy on your arms and good if you do a lot of placement
can stick with this string for a long time. But there is not that much power from the baseline and doesn't add that much
lastly, it don't last! It lasted maybe 2 weeks (approx. playing 8 hrs a week) and for me, that is a waste of money.
From: Jack, 5/13
Comments: After reading all the good things from all the reviews, I bought 4 of these X-One 17g. I must say
I'm a very good player, as I don't know how to rate it in number but I play tournaments and leagues in my country for years
with much success. Now, I'm telling you this because my feedback is very different from all I read. I strung it first on my
IG MP at 52 lbs, and the racquet felt very stiff. I couldn't play with it normally, so then I cut it and made a new string job at
On the court again it felt stiff, and I couldn't find length, as balls went short or way out. This string killed my forehand (my
weapon), as I still couldn't find spin and power. So, I really suffer playing with it.
From: Ozi, 1/13
Comments: The best multi I can settle in. It's my summer string of choice. It plays great but won't last, as I
one within an hour of a tough singles match recently. When I get tired of restringing I'd go Black Code, but when I feel like
back to multi the Biphase is always the one, even though I try others from time to time (pricing concern being the driver). I
string breaker and string myself.
From: Dan, 12/12
Comments: I have been using this Tecnifibre X-One Biphase 17g as crosses with Signum Pro Plasma
for a little over a month now. I definitely like the feel of both of these strings. The Tecnifibre strings have great feel and are
but fray like crazy. If you want a string that does not fray, these may not be your string. However, these play great.
From: D., 12/12
Comments: Very comfortable string with enough bite for control. However, I have never used a string that
and then broke so quickly. It's simply not economic. If you don't mind a restring every 10 sets or so then fine. Personally,
I string my own racquets it's not something I want to be doing that often.
From: Toby, 11/12
Comments: This is a great multifilament string. Soft, firm, with good control, and some spin. This is very firm
hitting a regular forehand. It's the best multifilament for me now. I hope it has more durability. The price is a bit high. I
full bed at 53 lbs on a Pacific X-Force.
From: Tong, 8/12
Comments: This string is the perfect replacement for natural gut without the heavy price tag.
It has "gut-like" feel with plenty of ball pocketing. I'm not a typical string breaker. I play 3
to 4 times per week and have had this string for almost two months. I believe this is perfect
for my Wilson K-Factor Six.One 90 Tour (16x20) strung on the mains at 48lbs and the crosses
with Top Spin Cyber Flash at 44lbs.
From: Chan, 7/12
Comments: Great string, feels very close to Natural Gut. I strung this
on my Head Youtek IG Speed MP 18x20. I loved this string on serve and
from the baseline, gave very good pop. Control and feel was average,
nothing special. What I found really annoying was the after 3 to 4 hours
of aggressive playing, the strings already began to fray. I used Luxilon
ALU Power 16L polyester strings before this and they lasted me a good 7
to 9 weeks. The X1 Biphase breaks way to often and for it's price, it is
not worth it. I had it @54lbs tension. However for the 3 to 4 hours of
play that I did have, they really preformed nicely, very elastic and
powerful. I got deep balls with power and good topspin 90% of the time.
I recommend trying this string for its performance, however you'll need
a deep pocket to afford it.
From: Bimal, 5/12
Comments: I used the X-One Biphase on my crosses and Kirschbaum Pro-Line II on my mains and it only
lasted about 5 hours before it broke. I will say other than the lack of durability it felt great. I have some arm problems
which this set up helped but it just didn't last long enough for me. I play with a lot of spin and hit fairly hard.
From: Joey, 4/12
Comments: String felt great and easy on the arm, but it started to fray after a couple hours and broke a
couple more hours of hitting later. Once it frays, it doesn't have the spin or pop that it did. I strung it at 55 lbs.
From: James, 4/12
Comments: Really nice alternative to natural gut. I had a Dunlop 200 4D Tour racquet strung with the
at 60 lbs and a newer racquet (same kind) strung with 17G version at 58 lbs. Both strings are very easy on the arm and
returns with good control. The 17G version has more power and better spin but less control than the 16G version as
strings move about (17G much more) and start fraying after about 2 months on but then seem to last for quite a while
Did not see much difference in durability between the 16G and 17G as both are shot after about 6 months (playing
twice weekly). I
play doubles (3.5-4.0 level).
From: Bert, 3/12
Comments: I was looking for a racquet to replace my Wilson K-Factor 6.1 95 18x20. I demo'd several
including the 2012 Babolat Pure Drive Roddick, Head Youtek IG Prestige MP, Boris Becker Delta Core Melbourne and the
Juice Pro. The Slazenger Pro Braided tops them all. The open 16x18 string pattern gave me great access to top-spin
Ball control and placement was also top notch. Kick, slice and flat serves were all amazing. Where the racquet REALLY
though, is at the net. The maneuverability of this racquet is almost telepathic. It's the perfect stick for the aggressive
serve-n-volley player. This is truly an amazing no frills, get-the-job-done racquet! Definitely worth a demo for any
who likes it at the net!
From: Chike, 3/12
Comments: This is a great string. I love the feel, it plays crisp, it has a good amount of power. A big step
the Wilson NXT Tour 17 I have used. A superb string. Strung my
Wilson BLX Blade 98 at 60lbs.
From: Rory, 2/12
Comments: Great string with a lot of feel and bite on the ball .. Better than the NXT Tour 17 that I have
as it feels crisper but not tough on the arm .. Tradeoff? Don't expect it to last more than 12 hours as far as usable life
From: Marv, 1/12
Comments: Very good in a full bed, but outrageously good in a hybrid. In a full bed, X1B 17 has many
natural gut including power which is sometimes too much. However, when it is crossed with Black Code 17, it has all of
qualities I enjoy without the excess power that
can cause balls to sail long. Try it strung at 58 with the BC crosses strung at 55 and let er rip. You will be amazed out
power you can drive the ball with without losing your control.
From: Anon, 1/12
Comments: An excellent string for as long as it lasts, seems to fray then notch in less within 3 weeks
then has to be
replaced prior to breaking. I can't afford to use it.
From: Anon, 12/11
Comments: Advantages of the X1 string is that it has a soft feel to it. I can feel the ball well and it has
potential and good pop. Disadvantages would be that it breaks easily, and I don't like entire string bed with X-One as it
feels like a
spring board. I also found it pricey. I like X-One in my crosses with Signum Pro Poly-Plasma on the mains and it works
went this route to get a little extra feel on the ball I felt I was missing with Signum Pro Poly-Plasma or Black code
strung the entire
way. X-One is not very durable so if you are a string breaker and don't string your own racquets I would not
you have very deep pockets. I am not what I would call a string breaker but I string 3 racquets at a time within 10 days
racquets I will have to string at least one racquet again. I play around 3 days a week and am a 4.5 player.
From: David, 11/11
Comments: I agree with everyone else's reviews. This is an all around type string. I think it is similar to
in terms of feel and touch.
From: Mikel, 10/11
Comments: This is an excellent string. There is tons of power, spin and control. But string starts to fray
hour. Anyway, this string has become my string of choice. I use a Babolat Drive Z strung at 55 lbs.
From: Gennady, 10/11
Comments: I really love the Tecnifibre X-One Biphase 17 string. It's the best string I've used. I've recently
to compare this string to NRG2 17. I have two Babolat AeroPro Cortex racquets; one is strung with NRG2 and the other
Biphase 17. Both racquets are strung at 60 lbs. The X-one string is better in many ways. I don't hit with heavy topspin
generate moderate racquet head speed, but I can definitely see that I have more spin potential with X-one. I also notice
string gives more control and "effortless" power. I get better net clearance, good depth and I find it easier to move the
the court. It gives good feel at the net as well. Also, it's very arm friendly and I can hit with a lot more comfort. When
NRG, I can feel a slight pain returning to my elbow. When comparing X-one Biphase 17 and NRG2 17, X-one is just a bit
all categories. I play twice a week and the only thing that I don't like about X-One is its durability. Once it starts to fray,
some tension and the balls start to fly, a bit.
From: Glenn, 9/11
Comments: I love this string! It is very powerful and has a lot of comfort and
feel. It has more comfort and feel than power. But they are all evenly
spread out. I have a Head Youtek IG Speed MP 18x20 and I put these
strings on it because I am trying out Novak's setup as an experiment. I
even have his vibration dampener. These strings are great and I definitely recommend them. They play best around 57
string! But it lacks spin. It has a low spin potential.
From: Anon, 9/11
Comments: Great string! I was a gut user all my tennis life (30 years) and this string is close as I found
yet. It is easy
on arm and spin and power are there. I use it in my Head Prestige Pro 600 and it is a dream. 3.0-5.5 players can take
the playability of this string.
From: Mark, 9/11
Comments: I have a hybrid of Tecnfibre X-One Biphase and Red Code 17 g at 26 Kg and while I love it, I
have to say
that it breaks way too quickly. X-One Biphase starts fraying in 3 hours and breaks in 4-5. The Red Code shows no
signs of wear
whatsoever. I just came back from tennis camp, played about 18 hours and broke strings on all my racquets. If you
don't mind the
constant purchasing/restringing than you'll love everything about this string, but for me, not durable enough.
From: Adi, 8/11
Comments: I suspect that of all the strings listed on this site with customer feedback attached, the X-
One may have
generated the most comments and with good reason; this is a very good string! I have a little variety in my game and
hitting with slice or top-spin from the baseline, making an approach shot or at the net, this string offers an amazing
of power and control.
From: AJK, 7/11
Comments: This is a great string but expensive as it lasts about 20 hours of play. I am planning to buy a
feet) which may last me 12 to 16 months. Some stringers tell me that the reel will dry out in that time and I should buy
order sealed packages of 40 feet. My question is: Will a reel last from 12 to 18 months without drying out? Or should I
than 10 sealed packages?
From: Ian. 6/11
(Ian, an X-One Biphase reel will not dry out. Gut strings would need to remain sealed, but this because X-One Biphase strings are made synthetic materials, they will last. -- TW Staff)
Comments: Great string. Provides good power, control, and spin. However, they will start to fray in 4
hours of game
play and will break within 20. Highly recommended if money and restringing won't be a problem.
From: Jessie. 6/11
Comments: I have to quote the post below by Rich because I could not write it any better: "I was an
advocate of the
Tecnifibre NRG 17g line. Well after trying this string I am switching. This string provides noticeably more power,
The wear has been acceptable. It's a slightly higher price but well worth it." I just could not agree more after stringing it
up in my
Organix 10 at 55/52.
From: Keith. 5/11
Comments: I haven't used Tecnifibre for 15+ years; their older products
simply lost tension WAY too quickly for my liking, and I've always gone
with Gamma or Wilson multis since then. My stringer recommended this
product recently when I wanted to try something different, but my elbow
simply can't handle poly for any significant length of time to use any
of the myriad on new strings in that genre.
This string was nothing like the Tecnifibre I remember from years past.
This stuff is terrific: power, control, doesn't move around too much for
a 17ga, it wears well, quite impressive indeed. I may have just found a
new favorite brand of multi to play.
From: BL, MI, USA. 5/11
Comments: I was an advocate of the Tecnifibre NRG 17g line. Well after trying this string I am switching.
provides noticeably more power, control,and spin. The wear has been acceptable. It's a slightly higher price but well
From: Rich, Bethany Beach, DE, USA. 4/11
NTRP Rating: 4.5
Comments: Too crisp to be a real replacement for gut for me but it feels great to play with; good power
spins are very easy to generate. Serves felt good, but control on groundstrokes for me wasn't as good as gut, power
bad either. Strung in a k factor tour 90 at 58lbs in the mains with pro hurricane in the crosses at 55lbs. Much easier to
gut with none of the panic that accompanies it. Playing in damp or wet conditions doesn't seem to be as big a deal as
gut either; in my part of the world I'd be stringing 3 times a week if I let my gut get wet and it's simply not practical nor
financially possible. Gut is simply too expensive. If money was no object then I would be using 17g Babolat vs gut with
hurricane I use now, but until then, this will more than suffice.
From: Steven, Scotland, 03/11
Comments:Words cannot describe how great this string is! It's virtually a natural gut at the fraction of
the price! I'm
a hard hitting all court player so durability is an issue and I found that for a multifilament string it holds up quite nicely,
it can last
about twenty hours before I need to restring. It wasn't too cost effective as a full bed but once I strung it with the black
the mains durability, feel, power, and spin were all there!
From: Earl, San Diego, CA, USA, 03/11
Comments: The best multifilament out there!! This string has a great balance of feel, spin, comfort,
power. I quit using the NXT's and Babolat gut for this string. It's easy to string and the durability is good for a
also appreciate it being easy on the body. If you like using a multifilament or gut...this is a must try!! Babolat Aero Pro
Aero Pro Lite Mains 60 / Cross 57.
From: James, Tuscaloosa, AL, USA, 03/11
Comments: The best string I have ever played with. It really improved my weaknesses without harming
what I was
doing well with my prior string (Luxilon ALU Rough 125). Finally a string that doesn't make you have to compromise.
simply got better! 4.0 Baseliner.
From: George, Boston, MA, USA, 02/11
Comments: Excellent string! At first I was a bit skeptical about switching from a poly to this
multifilament string. To
my surprise, it actually felt a lot better given the racquet I use. I found this racquet to have good power as well as
string also has more than average bite for a multi, producing good spin. The only downsides of this string is that on
hot days the
string can get a bit "mushy" and is not as crisp as a poly, but overall well worth the switch. 5.0 All around court player.
Youtek prestige mp 53lbs.
From: Jaime, Mississauga, ON, Canada, 01/11
Comments: I cannot believe I have been using full polyester set ups this long. After trying this string, I
not trying them sooner. I hit the ball pretty flat and these strings were incredible. With minimal effort, I am able to
amazing power. While there is some loss of control, the feel, comfort and power are worth it.
From: Barrett, KY, USA, 12/10
Comments: Strung on a Head LM Radical MP @ 57#. Soft feel, but not as soft as Gamma Pro 17, which
IMO is a little
too soft. I like the blend of soft feel and crisp response. Good power and spin as well. I am a topspin baseliner with a
and I like the ability this string gives to hit out from the baseline, hit side spin dancers, or paint lines and corners as
all around string.
From: Dave, Jersey Shore, NJ, 4.5. 8/10
Comments: X-One Biphase 17 is a great string. I strung it @ 63 lbs in my Liquidmetal Radical OS. It felt
comfortable regardless of my high tension and fairly tight 18x19 string pattern. It moves quite a bit but that's harmless
From: Anon. 5/10
Comments: It continues to change its tension and response over the days. Has lost much pop. I have to
string thumbs down. I much prefer Wilson NXT or Gamma Asterisk over this string for a multifilament.
From: Nori, Queens, NY, USA. 5/10
Comments: It's true what another person said; I strung my Pure Storm Tour (98 sq in) at 55 lbs, and it
like 60-62 lbs. I was shocked; The string bed feels very firm. Shots made in the center feel crisp and fairly good (like
Pro), but shots made even little off center are fairly jarring. Not a huge fan at this tension. I will try a lower tension if I
ever try it
again. Correct tension is probably like 50 lbs on this racquet. Think I still like Wilson NXT 17 or Gamma Asterisk 17
maybe I would think different if I had the correct tension; who knows.
From: Nori, Queens, NY, USA. 5/10
Comments: The string is amazing. Feel, power and spin, It's all in there! BUT! It has poor durability. I
play varsity for
my high school team, practice 5 days a week and matches 3 times a week. I strung it at 58 lbs, and after a week and a
string starts shredding. It popped 2 days go.
From: Dex, Pburg, NJ, U.S.A. 5/10
Comments: A great string -- power, control, touch, spin, it's all there. I use 17 gauge at 55 pounds in
From: John, Charleston, SC. 5/10
Comments: I really like this string and prefer it over any Wilson NXT or Babolat Xcel which IMO are
string performs very close to gut and hold tension well too. I would not hybrid this- especially with Luxilon, full string
57- 62 lb .
From: M.Darius, Bethesda, MD, USA. 4/10
Comments: This is the BEST STRING ON THE MARKET! PERIOD! You will not be disappointed in this
string. It offers
excellent control, feel, power when you need it, and I was very surprised at the amount of spin it generates! WOW!
must string it 5 to 6lbs LESS than you normally would string your racquet. I don't know why, but after I had my Volkl
mid10 strung at 58lbs. It felt like 63lbs! I thought my stringer strung it wrong, so I had it re-strung again; SAME
PROBLEM! So I
strung it way low like pro player Marcos Bagdatis at 50lbs. Mains and 46lbs. at crosses. WOW! There's so much more
control. This set-up feels like 58lbs to me. This string is so good specially for the price, it lasts very long too! Amazing!
string on the market.
From: Will, CA, USA. 03/10
Comments: Tecnifibre X-One feels and plays like gut at a fraction of the cost. Doesn't last long enough
for a full
set, but I strung these as the cross with MSV focus hex in the main and it is the best hybrid set I have ever played with.
the spin and control of the MSV with the power and feel of the X-One. If I could afford to restring after each session, I
all X-One, but this is the best alternative for the average player.
From: Shaun, Maui, HI, USA, 02/10
Comments: I've been using these as a cross-string for months in my PD Roddick GT @ 58lbs with LLBB in
mains, but have decided I prefer them as the full-bed. Great power, comfort and a surprising amount of spin for a
they don't last long, but for those with their own stringer, they are worth it. Best feel out there of any non-gut in my
From: Darin, Richland, WA, USA, 01/10
Comments: Bought for my daughter who plays varsity in high school and strings her own racquets.
are expensive but the control/comfort/spin are almost worth it. They were not as durable as I hoped, lasting only 7
days (2 hours
per days on the courts). My daughter hits with above average topspin. We are looking for something that plays as well
and is more
From: Anon., 10/09
Comments: This has been my favorite string I have used. I play a Yonex RDS 003 and feel so much more
about my game. Can't wait to start to tweak the tensions and see what else I can get out of these bad boys.
From: Matt, Missouri, USA. 10/09
Comments: Agreed, don't pay attention to the negative comments. People need to pay more attention to
construction of a string and compare it to similar strings. This string seems to work best in mid-size frames that are on
side like a Wilson Pro Staff 6.1 classic because it opens up the pattern a little more. The string is best comparable to
fils like Wilson NXT and NGR. Personally I'll take this string over NXT because its a little firmer feel on ground strokes
but also has
softer touch on more delicate shots as well as good ball pocketing without TOO SOFT a feel.
From: Joe 4.5, Woodstock, Georgia USA 08/09
Comments: Switched to an all X- one biphase from a hybrid of Big Banger and Xone.
The spin is incredible and so is the power. Felt that Big banger dampened the racquet and added nothing to my game.
brought my racquet to life. It does not last as long as the hybrid, but whats important- winning matches or string cost?
From: HD, Abudhabi, UAE 08/09
Comments: It feels like this string grabs the ball and throws it over the net. It is immediately noticeable. I
surprised at the amount of work I got on an American twist serve. Extremely crisp. I will have to wait to see if it is elbow
like the TGV.
From: John, Atlanta, GA, USA. 07/09
Comments: Don't pay attention to the negative reviews. I decided to try the Tecnifibre X-One Biphase 17
From the start a big, big difference. Immediately, I felt the advantages of using this strings. Better feel, better control,
topspin, more power & spin on your serves, holds the tension well & at the same time soft on your arm. Actually, with
strings, my new racquet became alive. The only thing I didn't like is the durability. I have been playing with the same
about three weeks now, but by the way they look, it seems that they only have one to two weeks more to go. So I
decided to put
on string savers on my next Tecnifibre X-One Biphase 17 string red that I have already bought for my new string job.
Go ahead &
try this strings, you won't be disappointed by the overall performance & actually it may improve the level of your game.
From: Luis, Edmonton, AB, Canada.
Comments: This string is very GOOD as a hybrid, you just have to use the right poly on the mains
crashes fast. I used a poly string as a hybrid and almost every shot I hit went in..you'll have to figure out the
combination can't let
the secret out!
From: Janae, USA. 04/09
Comments: Great feel, power, comfort, durability, everything. My current string and it plays pretty darn
Strung it of my Kfactor KSix-One Tour 90 at 55lbs.
From: Jason, Va, USA. 2/09
Comments:This is my first experience with Tecnifibre (after reading about it on TW, had to try it out).
Strung on my
Prince and Wilson rackets, both in hybrid setup: Tecnifibre X-One 17g (57lb) main with poly strings 17g (54lb) cross.
outdoor public courts, it's very cold. The X-One made the setup playable, good power, top spin and slice, good bite.
for 2 months now, no signs of wear, no shredding, yes, the strings are moving now on my Prince racket, but no
movement on my
Wilson Kfactor. Is X-One available in a reel? I'm going to try more Tecnifibre strings in my hybrid setup now.
From: Jami, Walnut Creek, CA, 12/08
Comments: String doesn't last if you hybrid with Luxilon Rough. lasted like a week or so.
From: mathew, California, US. 11/08
Comments: An amazing string. Exceptional, with unsurpassed power. Control is outstanding despite all
and pop. The consistency from shot to shot is really commendable. However, I think quite different from other
reviewers. It is not
as comfortable as other quality strings. NRG2, 515 are clearly more comfortable. They're more gummy. X-One is wiry,
playing. This also affects feel/touch. Again, compared to NRG2 and 515, the touch is just not there. Not a very good
aggressive net play (basic volleys are good though). Strings don't move much, even though i'm taking really big cuts at
Tension retention is not as good as NRG2 or 515. Again this is understandable, considering the power characteristics.
good. I tried VS Team 17 and X-One 17 blows it out of the water in terms of power and control. Spin is quite good as
better than VS but only almost as good as 515 and then NRG2. I'd say this is the best string for an aggressive baseliner,
occasionally goes in for a volley putaway or a smash. It isn't very suitable for a serve and volley game, the touch and
insufficient. I'd probably say that NRG2 17 is the best overall string on the market. If you simply want power along with
control, X-One may be the best there is, even better than many guts..who knows.
I used it on a Volkl C-10 Pro Tour (93, 353 grams, 61 flex) @ ~58-59 lbs. Used it for 1.5 months exclusively, playing
everyday; no breakage, not much fraying. Only in the last week it lost more tension and started feeling a bit subdued.
again and install it as a cross, with gut on the mains. I think I'll have the best power, control, tension retention, touch,
combination available on the market then.
From: Memed, Istanbul, Turkey. 11/08
Comments: This string feels great in my Tecnifibre T-Fight 295. I have been experimenting with lots of
combinations and I stumbled upon an interesting, long lasting set-up. I put this Biphase 17 in the crosses and Gamma
in the mains-both multi-filament strings. Seriously, I've had these strings in for almost a month and the sweet spot is
responsive, yet forgiving at the same time. I'm 27, hit the ball pretty hard and with lots of topspin, the Gamma in the
doesn't even have notches in them yet; weird. Usually I have the racket on my stringer by now for a new set, but they
wear out. It's like one of the packages is marked wrong and I really have polyester strings in! The Gamma is a good
string, but I
will go back to my favorite Klip Venom in the mains to compare again. I love stringing and experimenting with all the
stuff out there; I've had the bug for over a year now and would recommend to anyone who enjoys the technical side of
buy a stringer, it's easy and pays for itself in the long run.
From: Joplin, Missing Monterey Bay, USA. 11/08
Comments: The best multi string out on the market. It's amazing how much power I got out of it and the
is exceptional. It lasted me three months and is now showing slight signs of wear.
From: Rasheeq, USA. 9/08
Comments: This string is simply the best synthetic on the market today. It has the feel of natural gut,
but with a
little more power and durability.
From: John, Suitland, Maryland, USA. 8/08
Comments: Ok here is the deal, I use Tecnifibre X-One Biphase 17 string as a hybrid with Babolat Pro
Tour 16, and I have to say that it's simply amazing. Every shot in my arsenal feels crisp thanks to the Tecnifibre strings
and I can notice how much spin I get with the Babolat Pro Hurricane Tour. The only thing that I notice is that because I
am a big
hitter that the Tecnifibre strings are starting to fray a little bit.
From: Tyler, WA, USA. 8/08
Comments: I normally use a hybrid Luxilon Alu Rough with Wilson NXT crosses, but I tried out a full set
of the X-
One 17s while I was waiting for a new order of strings to arrive. The X-One offered great feel and decent spin, but it
powerful as my normal setup. I'll consider trying them out as crosses with a slightly lower tension. Babolat AeroPro
17 @ 61 lbs.
From: James, Emeryville, CA, USA. 7/08
Comments: Great string. String it in the mains, with Kirschbaum Pro Line II in the crosses. I'm still
with tensions, but I believe this will be my permanent set up. Nice power feel & comfort. Currently at 58/52 in a Yonex
RQS 22. I
am a 3.0 senior all courter.
From: Stewart, Decatur, GA, USA. 7/08
Comments: I only read the description of this (and many other) strings without reading any feedback. I
on a whim and told them to string it a little more toward the power end. From the first time I played with this string, I
felt I had a
larger sweet spot, I had more "feel" than with any other string- spin, power, AND control were all there. My league
remarked how well I was playing. I've never been happier with any other string- ever! Highly recommended!
From: Lindsay, Oklahoma City, OK, USA. 7/08
Comments: I have tried a variety of multis during the past couple of years as well as some multi/co-poly
and I keep coming back to this string. For me, they're the best non-gut synthetic. I get no additional spin, control and
a poly than I do playing X-One. My only "complaints" and the reasons why I've experimented with other strings, are
the strings move around a lot. But, because it does everything else so well, I'll continue to use this string as long as
makes it. My set-up is a Babolat Pure Storm Tour at 56 lbs all around. I've used the red X-One before in this racquet,
and it looks
From: Adam, Southern California, USA. 3/08
Comments: This was the worst string I have ever used in my life. Every ball that I hit felt dead, and every
time I tried
to hit topspin, the ball went dead on me. If I were you I would not pick this string.
From: Anh, Spring Lake Park, Minnesota. 3/08
Comments: I used this as a cross string with Luxilon in the mains. It felt great, but it was totally trashed
after a only a few hours.
From: Matt, Chicago. 2/08
Comments: Great string, but fairly bad durability.
From: Andrew, Ringgold, GA, USA. 2/08
Comments: The strings were great; I got a lot of pop and control.
From: Mike, CA, LA, USA, 11/07
Comments: Compared to the new Wilson K Gut Pro, this string is fantastic. Both have a tacky feel when
strung. Nothing I've tried surpasses the soft, playable feel of X-One Biphase. The more expensive K-gut Pro is crisp,
but the soft
controlled feel of X-one is superior. I have 16-gauge X-One on my 18X20 Tecnifibre 320. I found no durability issues
thicker gauge, but I used 17G on my Liquidmetal Rave mains with ALU Rough 16L on the crosses. Great for a 16x19
power and control if you don't mind the softer mains being cut by the stiffer poly crosses. I don't know how a hybrid
work with the X-One strings unless you use in the crosses. They are very soft and don't hold up in humidity or moist
X-One Biphase compares favorably with playable Gamma strings like Live Wire 17 and Gamma Professional. All of these
suffer in durability if you hit with heavy spin. Fraying is evident after just one play with 17 gauge versions. If you're a
breaker, I recommend 16G X-One over all other brands. If you desire the extra feel from 17G, well the Tecnifibre X-one
strings are worth the price at 75% the cost of Gamma Professional or K Gut Pro.
From: Jim, Montgomery, TX, USA. 10/07
Comments: I love the way the ball feels when I hit using this string. I believe it is perfect for my Wilson
(16x20) strung at 60lbs. I've noticed much more spin on my shots and the part I love the most is the way volley's go
direct/want them to go like I've never experienced before. It also provides nice power and control blend in this low-
powered racquet. I've also noticed that I have more control on my lobs when opponents approach the net. I highly
this to any player looking for great feel, control, desire for topspin, and laser feel on volleys. I am a 3.5 player
enough at the net, but working toward being an all court player.
From: Mike, Arlington, VA, USA, 09/07
Comments: Every now and then I get this great idea that I should try another string. I catch myself
or comments and get curious. But every time I go back to Tecnifibre X-One Biphase...I wonder why I strayed away. X-
with the right combination of feel, control, power and consistency for me. Some people say it goes dead after a short
time. To me it plays better and better right up to the breaking point. Only thing I have against the string is that it
plays a little
stiff the first hour or two. Gamma Professional is the only string I have played with that might play a bit better...but
the cost, I'll stay with X-one.
From: Rondall, Glen Burnie, MD, USA. 8/07
Comments:Only problem with this string is that it isn't sold in a half set. Have to buy a whole set when
hybrid. I like the power and pop with this string but with an 18x20 string pattern I could not generate much spin. I
recommend this as a good cross with Babolat hurricane or Wilson Enduro in the mains. This string also starts to fray
hours of play.
From: Dave, Lajolla, CA, USA, 08/07
Comments: I tried this because of all the good feedback that there was, before this I had been using the
POWER 17, this string had much more control, and somewhat more spin. Overall I would recommend this string.
From: Vincent, USA, 06/07
Comments: These are the best strings ever. I play with Ashaway Kevlar 17 gauge tension 57 on mains
from synthetic gut to Tecnifiber x-one gauge 17 on crosses. The spin, control, and power at tension 61 on head
radical are just amazing. This is the best string in the world right now. Period. No arguments.
From: Hormaz, Saipan, Northern Mariana Islands, 04/07
Comments: I tried these strings with some new Volkl V1 DNX frames. The 17-gauge string or the frame
triggered some very severe tennis elbow. I have always used Tecnifibre strings in the past and used the NRG2 16 gauge
success. It's been a year and after taking 6 months off my elbow is back to normal. I am going to go back to the NRG2
same frame that caused the elbow problems and see if the elbow holds up.
From: John, Temecula, CA, USA, 03/07
Comments: Great string. I love it so much. The only thing I didn�t like is the durability. So I decided to
string savers and try the 16. Must try.
From: Anon, 12/06
Comments: Without a doubt the best synthetic string on the market (and better than some natural gut).
racquet stringer and use to recommend Wilson NXT 17 to my serious playing customers. In the last year from my
they're all playing with Tecnifibre x-one Biphase 17 now and everybody's happy.
From: John, USA. 11/06
Comments: Probably the best string I�ve used this far along with the Gamma TNT Fusion 19g. Initial
but after a few hours of hitting it felt great. The only problem with this string was that it didn't last me very long so I
I�ll use it again due to the price. And just a random bit of info, the strings broke on the crosses for me.
From: Lawrence, Placentia, CA 08/06
Comments: This is by far the best, most "gut-like" string I�ve ever played with. I
played with BDE gut Rally and was happy. In the past I have also tried many that claim
"gut-like" feel like Gamma Pro XP, Laserfiber Pro, etc...but nothing seems to come close. I
would say that this string even felt better than my favorite natural gut as far as feel, control
and power. I hybrid with Luxilon TI-MO as I did in my gut string. Tecnifibre X-One Biphase 17
String just feels better and my control is now awesome.
From: KC, California, USA 07/05
Comments: The best multifilament around for the first 15-20 hours, after which
the string becomes slow to react and I feel like I need to push the ball off the strings in
mid-stroke. I play a ProStaff 5.0 at 62lbs. Strings typically do not break until about a 30-40
hours and when it does it�s always a cross.
From: Nekki, Los Angeles, CA, USA. 04/05
Comments: Great string. More control than NRG2 and better feel. Better than gut
in that you don�t have to worry about the damp. This string is easier to string than gut. Great
string. The best multi out there for feel, great job Tecnifibre.
From: Bill, Alberta, Canada. 10/04
Comments: This string offers great feel, power and control. At half the price of
gut with similar characteristics-it's a great buy. String durability suffers with the thinner
gauge lasting about a month before fraying. I'm an all court 5.5 player who strings his Head
Mid-plus XL i.Prestige between 56 and 62lbs.
From: Damion, Los Angeles, CA, USA. 08/04
Comments: The 16g version is just as good. I would say that the string is stiff/
yet soft when you hit hard. Strings do lock in place.
Durability is extremely better than Tecnifibre NRG2. I play two times per week and have had
this string for almost two months. I'm almost tempted to say that it�s worth the price.
From: mackadilly, Talk Tennis. 4/04
Comments: I thought this string was really nice. Gummy like the original
Tecnifibre 515, so the strings locked in place, responsive, powerful enough, great soft feel,
big sweetspot, great spin. Suspect the durability might be better than Tecnifibre NRG2,
especially since the strings aren�t sliding around at my usual tension. Tension maintenance
appears to be much better. I did a pre-stretch when stringing.
From: NoBadMojo, aka Ameliaislanded, Talk Tennis. 4/04
Comments: I got a free sample set with the purchase of a racquet and I didn't
like them at all. I played one set and cut them out. Even though the strings were strung at 2
pounds under the highest recommended tension, I couldn't generate spin or slice. They
produced power and no control. If you decide to try them, I would recommend one racquet at
From: Brad, USA. 4/04