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Comments: Softer and more zing than synthetic gut NXT that I also liked. Maintains playability and tension
until breakage. Must use elastocross to keep main strings from notching and fraying and finally breaking. I'm a USTA
player at the 4.5 level and play with a Head Speed MP with it strung at 62 lbs. I find the higher tension is needed to keep
the mains from shifting and sawing as much, plus I like tighter strings for control. I had some unexpected breakage one
time near a grommet, not sure why.
From: Chip, 11/15
Comments: I was very disappointed with this string. No power, feel, or playability. It played like Excel. I tried
Gamma TNT2 and that was a lot better.
From: Anon, 8/15
Comments: I'm a 4.0 weekend player. I broke a full bed of strings after 5 hours of play. Strung at 57 lbs, the
moved too much when I was hitting with topspin. Eventually it broke. I liked the feel and power of Tonic Natural Gut.
From: Nick, 3/15
Comments: After using Team and Touch the past year in my mains with hybrids (poly crosses) I wanted to try
16 in full beds to use between tournaments. Two beds snapped; the first one two weeks after stringing and another bed
today. Both were strung at 59 lbs mains/57 lbs crosses. Even at $10 less a pack, it's too expensive for a string lasting such
time. It seems as if some of the string is pure coating with minimal gut so when the coating wears down it unwinds and
following as if there were no coating it would snap while stringing. It was great while it lasted 2-3 weeks. In contrast, I have
in one of my racquets (hybrid) that was strung 6 months ago and seen more use than any of my current beds and it's not
much while the coating has certainly worn off in the sweet spot there are no strands unraveling. Stick with Touch or any
you may be familiar with. I'm going to try Klip uncoated next.
From: Shaun, 6/14
Comments: I am using this string for the first time. I have always used gut. This was highly recommended. I
getting no power and it feels dead. I have a Wilson Blade Light and strung it at 58 pounds. Also my arm is hurting.
From: Becky, 5/14
Comments: I have put around 12-15 hours in on these strings so I feel like I can now provide a decent review. I
a full bed of these strings in at 60 lbs. in my Prokennex Ki Q5 295. I was suffering from some golfers elbow. To make a long
short, I really like these strings, and so far they have been well worth the money. They are comfortable on the arm. My arm
longer pulsates in pain after playing (my racquet also helps this a lot). I can get great depth and spin with these strings,
supply plenty of power when I want it. What I've noticed most about this natural gut is its ability to keep tension. I was
Tecnifibre X-One Biphase 18. The X-One is a great string, but you could definitely tell when it started to lose tension after
hours. This natural gut still feels like it's brand new.
From: Anon, 11/13
Comments: This will be different - I play a friend of mine once a week and recently he broke his strings, which
Babolat Tonic 16g Natural Gut. He switched to his other racquet which had synthetic gut strings in it and, trust me, he was
different player, really. His groundstrokes with the Babolat Tonic Gut strings are fierce, with lots of spin, power and depth,
with the synthetic gut it was the complete opposite. It really was like he went from a 4.0 player to a 3.5 player without his
strings! I'm sold and now I will be stringing my other racket with these strings.
From: Joe, 4/13
Comments: I am an old school player, with a one handed backhand, using a Wilson BLX 95 racquet and for
some of the top multi filaments like Technifibre X One or NXT might be great when freshly strung, but they become un-
after 8 hours even if they don't break. And the performance deteriorates sharply towards the last few hours (and I don't
usable life in it. And the performance is more consistent throughout. If you have tennis elbow problems, nothing beats gut.
From: Mark, 2/13
Comments: I've been playing with Babolat Tonic for over a year now, and have settled on Tonic 16g in the
my Volkl Power Bridge 10 Mid and Weiss Cannon Turbo Twist 1.18 in the crosses at 59/57 lbs. I let the racquet sit for a
two for the tension to stabilize before I play it. I like everything about this combo - comfort, power, control, spin, durability,
the strings don't move. My game is a little old-school - eastern grips, all-court to serve-and-volley. Works great for me.
From: Rob, 4/12
Comments: Picked up this set and learned that it has the BT7 formula now even though the product image on
doesn't show BT7. That being said instead of putting in it a full bed I strung it in the mains with ALU Power in the crosses.
Enjoying this set very much.
From: Jeff, 4/12
Comments: I like the Babolat Tonic + Ball-Feel Natural Gut 16 a lot. Good choice if you are not a string
From: Anon, 10/11
Comments: I switched racquets and string set-ups since my review of these strings in May
2010. I have tried many string sets since, and I have found one to stick with. So, I now play with Tonic+ (56 lbs) in the
Luxilon Alu Fluoro 17 ga (55 lbs) in the crosses on a BLX 6.1 Tour, no vibration dampener. This string set packs a huge
generates lots of spin. My kick serve to the backhand in the ad court is basically unplayable for people with a one-handed
backhand, and my inside out forehand just leaps off the court. I played with Tecnifibre X-one Biophase 17 ga. as a full
or in the mains combined with the
Luxilon Alu Fluoro, but I kept ripping through strings after about 10 hours of play. The gut mains have held up for 20 hours
already without any signs of fray or notching. Tonic+ is more expensive, but the extra life I get out of them is worthwhile,
mention the gas I save by not having to drive to the store. I don't think I will be changing from this set up for a while.
From: David K. 5/11
BLX 6.1 Tour with lead to 13.0 ounces, strings as above.
Comments: This is a follow-up to the report directly below by me. I happened upon a post on the TW board
regarding a player who experienced the same disappointment after playing with the strings for the first time today. I wrote
to him and realized that I had better come back to my review and make some comments here also.
The strings seem to come alive after about two days. Yes, really. At day three I was powering the ball whenever I needed
effortlessly. My touch is better than the NRG 17, my serves are great and I actually have confidence in a drop shot actually
dropping and stopping. So, try this string. But give it 6 sets before you make up your mind one-way or the other. I would
never thought so as Gut holds tensions so well...but it just seems to wake up.
From: Keith, Leesburg, VA, USA, 01/11
Comments: I had these strings installed when I ordered my Boris Becker V1 Classic from TW. This racquet is
notorious for being arm friendly and soft with a low 63 stiffness, even less than the Volkl C1 classic (its sister racquet and
company). With the discount on the strings for purchasing it from them, I thought it would be the perfect opportunity to
arm friendly a splurge on gut! I had demo'd the Volkl first, and found it to be exactly what I was looking for. No wonder
continues to keep it in production. But with the BB spec stiffness even lower, and all the reviews about the sweet-spot
more generous, I bought it. The point in all of this is that when I hit the courts with my new stick, I was extremely
felt like a board, felt as though it was strung at 63lbs instead of the 54lbs that it really was strung at. (My demo, strung
Gamma Live Wire 16 felt buttery soft, pocketed well and gave ample touch and power.) I played 3 very focused hours trying
loosen it up and find the tiny sweet-spot. Auggh! On a positive note, my serves and overheads were like thunder! I really
cut 'em out...
Regular stick: Volkl Tour 8 using Tech NGR2 17 at 60lbs. Wonder why tennis elbow is acting up? Classic strokes one handed backhand, 4.0 rated doubles player, playing since 1974.
From: Keith, Leesburg, VA, USA, 01/11
Comments: This was my first gut. I had it put on my brand new Dunlop 4D Aerogel 300 (16x18) at 57 lbs of
tension. It played with a lot of power and decent control. Notably, this racket is not known for generating lots of power, so
extra something from gut was welcome. I did not think it offered much more spin. My serve is really "dialed in," and I can
velocity slice or heavy topspin without much difficulty. I am a 4.0 player who predominantly hits from the baseline with a
amount of topspin, and I play 90% on HarTru. These strings frayed almost immediately, but they haven't broken after 20+
of play. They seem to be losing tension and feel by now, but I figure I got a bargain. Just be sure you don't take it to a
From: David K, Weston, CT USA. 5/10
Comments: Dead and hard like a rock! No playability or power. I requested to be strung at 57 lbs on a new
pure drive GT, but felt like 59 lbs or higher. Didn't like it at all.
From: Anon. 04/10
Comments: Just wanted to re-emphasize my earlier review of this string. I wrote about in 5/08 (see other
After 18 months of using this string, I am still buying it. My racket setup and string are the same as when I posted my
review, and my game has continued to improve. I can tell how badly I played when I accidentally bought the 15 gauge
instead and had my racket strung up - it fell flat. I can't to use the 16 gauge for great ball feel.
From: Brian, Savannah, Ga, USA 09/09
Comments: Tonic+ gives me enough control and power. I strung these strings at 59lbs on Price Ozone Seven.
shots are heavier. These strings are very soft as I used to play fully poly on 62lbs. One problem is that these strings can
easily than I expected. I recommend these to those who have money and time to try these strings. I will string next time at
when the max tension of these string is about 63lbs.
From: Fotis, Greece. 3/09
Comments: I string my Prince O3 Speedport White 60 lbs. Tonic + in mains, 58 lbs.Signum Pro Poly-Plasma
17L(1.18) in the cross. I drop down 2 lbs. on the poly. It really opens up the sweet spot. This is a great combo! I have
experimented with a lot of strings and combos, so far this is the best. I string my racquets,and you have to be careful on
two pulls because the string is very soft and the coating they put on the string for moister will let it slide in the diamond
clamp. So I clamp the first pulls a little tighter.(NOT SO MUCH TO DAMAGE THE STRING) After the first two pulls a lot of
is on the frame and not the clamps, so I loosen the clamps a bit. This set up gives you everything: Great feel, very accurate
power and great spin. The poly in the cross really helps with better durability. I do recommend it for players who want the
natural gut with durability and control with no loss in power.
From: Dennis, Burnsville, NC, USA. 7/08
Comments: I never believed the hype about natural gut. Reviews said that the new multi-filaments were just
good. And cheaper. Not true. There is nothing like the feel and control of this string. Best ever. And doesn't break, at
From: Marc, Leesburg, VA, USA. 7/08
Comments: This string at 63 pounds on a Babolat Pure Drive Plus (11.2 oz version, not the Roddick version),
me to hit the forehand as hard as I want and with stunning pace. I was amazed. When I went to have it restrung with the
top of the
line Babolat gut, it was an awful replacement. I went back to the Tonic at 63 lbs and the racquet was good as new again. I
imagined a better combo but it works so well. The rest of my shots have also become a lot more precise and heavier. I will
plenty of this for a long time.
From: Brian, Savannah, GA, USA. 5/08
Comments: This is the best string I ever played with. It's very soft on the shoulder and gives you a lot of
am suck at volley but with this string my volley becomes very accurate. But one thing disappoints me that after 8 games of
the string broke (I am a 54 year old Asian male who never breaks string before).
From: Don, Los Angeles, CA, USA, 05/08
Comments: Highly recommended! Great string for the money, and lasted about 2-3X as long as Xcel or NXT as
cross string. I've strung my Graphite Classic 93 at 58# with VS Gut on my cross strings for years (I use Pro Hurricane Tour
58# on the mains) and really couldn't tell any difference between them. For the price difference, it's well worth the savings.
use it for a main string, since I hit a fairly hard ball with heavy spin, and only get about 4-5 hours out of a full set vs 7-9
when I use it only on the crosses, which I'm more than happy with. As a reference I only get about 2 hours out of Syn Gut
Stamina. When I used it with PHT 16g it broke before the mains did after about 10 hours.
From: Kevin, Windermere, FL, USA, 06/07
Comments: This is a good string. It is soft, comfortable, easy to generate spins and it gives you feel. It's
my Ncode 90 at 56 lbs.
From: Albert, Montreal, Quebec, Canada. 5/07
Comments: This is now my string! I had some pain in my elbow, so I decided to step up and try this string.
elbow pain went away very quickly, not to mention this was the best string I had ever played with. It has so much feel!
I use it in a hybrid with the Pro Hurricane Tour 17g on the mains, I also get longevity. With this hybrid, I get PLENTY of
before it pops. Yes, it does fray fairly quickly, but it will still perform up to my expectations. Try this string! I know it's
I just don't think you will be disappointed. I am an average string breaking 3.5 - 4.0 who plays with a Prince Tour NXG
strung at 62lbs several times a week.
From: Jesse, Chattanooga, TN, USA, 03/07
Comments: It's an amazing string! Used as a hybrid w/ ALU power rough on my Aero pro drive @ 50 lbs, it
like a charm! Perfect feel, depth, control, and spin. All my shots were hard, heavy and deep! After using polyester all this
felt no shock, but perfect feel!
From: Kevin, Irvine, CA, USA. 10/06
Comments: Wow is all I can say. I played with gamma ruff for my whole life. (I still love the spin). But wow, this
string has a lot more power, yet it also has more control. I have had problems with my shoulder and I feel a lot less
using this string. I will need to hit with it more to see if I can maintain this level of play or if I have just entered the zone. If
truly is the string, then I would most likely use this string all the time in tournaments at least.
From: Roland, Taber, Alberta Canada 08/06
Comments: Everyone needs to try this string just once! Could have saved a boat load of money on over 100
racquets demoed and bought since 1999! I have been on a hunt for power, control, and arm protection since I
could no longer get around a 12.25 ounce Head Genesis 660, an otherwise perfect cannon with the largest
sweet spot in tennis. I have been through many expensive racquets: seven or eight volkls, ten or fifteen
princes, Head's, Wilsons, the list is endless. I tried many synthetic strings at varying tensions from high to low. I
just couldn't buy enough power to get the ball to the baseline. I thought several times about giving up a game I
have loved for 45 years. Then I stumbled on a discussion of natural gut, read the posts, and bought some tonic
+ 16g and strung up (55#) a Volkl Catapult V1 MP and played with it. Fabulous!!!!! I was ripping groundstrokes
to the baseline from a backhand which I could only get to the service line for six years! I ripped cross-court
forehands from corner to corner for the first time in 20 years! Booming serves. Some floated strokes but I'll get
used to handling the power. And drop shots 18 inches from the net! Everyone should try natural gut... and
Tonic 16G is where to start. I don't know about durability... I no longer break strings, but frankly, I wouldn't care
if I had to string it once a week. I doubt that I will have to from what I read. I could have saved so much money on
racquets... many would have worked with gut.
From: Paul, Atlanta, GA USA 04/06
Comments: My first dive into natural gut, and there is a definite difference. I'm a
feel player, and these strings gave fantastic feedback. I got gut for the first time because of
bad case of tennis elbow, and I now play pain-free (note: lots of rehab and no tennis for 3
months, but I'm back and playing). compared to some of the other "arm-friendly" strings that
I tried that are not gut, those synthetic strings do provide lots of dampening and are good for
the elbow, but provided no feedback, which i hated. Gut is the way to go from now on for me.
my only complaint about this string is that it frayed very quickly.
From: Gus, Austin, TX USA 01/06
Comments:Tonic+ was my first gut strings that I have tried with my Babolat Pure
Drive+. My hits feel crisper than with other synthetic strings like Sensation. What I learned
by using them twice is they have more power than I was used to and would string next time
at 65 lbs. I had difficulty keeping groundstrokes inside the lines when I had them strung at
58 first time and 61 second time.
Atlanta, GA 10/05
Comments:Tonic+ lasted me about 3 hours on my Wilson ncode nsix-one 95. I
think it hit awesome,
and it felt good on my elbow, but if I was to do it again. I would use it only on my crosses and
not at all on my
mains. I am an average string breaker. I just felt they broke way to easy.
From: Roy Herrera
Poulsbo, Washington, USA 10/05
Comments: For a while, I was looking for the right tennis string. I had my mind
set on Klip Adrenalin
gut, half polyester), which was a beautiful combination, with a very soft and comfortable feel.
I was about to buy
6 packets, until I
browsed through Babolat Natural Gut strings. For me, Babolat Natural Gut was a legendary
string but out of
reach because of the
price. That was until I bought a pack of Babolat Tonic+ Natural Gut 16. Absolutely slaughters
the Klip Adrenalin
and lasted me about 2 months (playing 3 times a week for 2 hours each day). I would
recommend this string to
anybody, as it is
the ultimate string.
Also, it was strung in a Head Liquidmetal Prestige MP, at 58 lbs.
From: Jacob, Melbourne, Victoria, Australia. 7/05
NTRP Rating: Different rating system here, I play Section 2 Pennant.
Comments: Best gut string out there for price. This string comes off the same
production line as Team and Touch. It just doesn't measure to the strict requirements of
thickness that Team and Touch has. Tonic is not consistent in thickness throughout the set.
That is why the thickness is a range (1.28mm -1.32mm) and not a set measurement like
Team and Touch. You basically get the same string for cheaper!!!
Alex, Houston, Texas, U.S.A. 06/05
From: Alex, Houston, Texas, U.S.A. 06/05
Comments: Wow what a great string. If you have a classic racquet like me try
this string. I string my pro staff 6.0 85 at 55 lbs. and it is sweet. I have experimented with a lot
of string and so far this is the best. I think I am going to stick with this set up for a while, it's
been about 2 months now and the string and the performance is still there. If you are not a
string breaker or if price don't matter do yourself a favor, try this string or any gut for that
matter, it will be worth it considering the feel and performance you get. Very comfortable and
it feels like the ball stays longer in my racquet.
From: Tim, Fremont, CA, USA. 05/05
Comments: What a great natural gut string. At 10 bucks less than the VS Touch
or Team; it's a great buy. Same Babolat quality/durability/playability. This string is actually
rated softer than the VS Touch 16 by the USRSA. I like this gut string best of all other
available guts by any company. Babolat - great job!
From: Bill, Alberta, Canada. 12/04
Comments: I love this string on my Head I prestige. Great feel and comfort.
Babolat gut is so much better than other brands in finish. Much smoother, allowing less
fraying and better durability. Much better feel that 15L tonic.
From: David, Arlington, VA, USA. 10/04
Comments: I'm an instructor for beginner to elite tennis athletes and teach
about 50 hours per week- this includes playing lessons with elite players. Even with all this
pounding I got 8 weeks out of a set of this gut. the Thermogut process really improves the
fiber adhesion and moisture resistance (I live in the South with both high humidity and
temperature). I saw fraying only just before string failure. It's easy on the arm and provides
an excellent level of power, control and feel. This is a great buy.
From: Steve, Georgia, USA. 8/04
Comments: Best string for my Babolat Pure Drive Plus that I've ever used. Great
control and durability. I can get about a week (20 hours) of play out of it.
From: Brian, Purvis, MS, USA. 3/04
Comments: I put this string in my ProStaff last October. I got over 3 months of
solid play out of it. It feels almost as great as VS Power with better durability and price. I
was impressed with how the string maintained its tension.
From: Tom, Minnespolis, MN, USA. 2/04
Comments: I put these strings on my Head i.S2 OS and It feels great! Not soft
as Wilson Sensation (What I use mostly) but it gave me some boost on my volleys. It does
add some power to my shots. So far there is no breakage or any sign of it. It is as advertised
as a stronger natural gut string and feels and looks new after 2 weeks of playing. It is kind of
expensive but it is a natural gut. I do recommend it for players who want the feel of natural
gut with durability and some control/power.
From: S.Lee, Detroit, MI, USA. 11/03
Comments: If you want more playability, and you want to keep it a little bit more
reasonable in price, buy it! The best price for natural gut!
From: Kenneth, Belgium. 9/03
Comments: This Tonic Natural Gut has taken my Game to a level I could not
have imagined! I have much more power and control than ever before.
I am sold on any natural GUT string for my tennis game. I will never play with synthetic
again. If you want your game to go to the next level buy natural GUT!
From: Jose, Denver, Colorado, USA. 3/03
Comments: I like the Babolat Tonic + Ball-Feel Nat Gut 16 better than the BDE
Performance 17 gut. Good choice if you are not a string breaker as it is reasonably priced
and offers the typical playability and power/control of gut.
From: Moses, Mission Viejo, CA. USA 7/02
Comments: With the price of top-notch synthetics rising ever higher, this product
is a better buy than any them. Great feel, power, and control. None of the string shifting you
find with synthetics, either. It's well worth the few extra dollars it costs opposed to a high-end
For the money, this is a better buy (and far more playable) than anything Gamma, Wilson,
etc, can come up with.
From: Steve, MI. USA 6/01
Comments: Tonic+ Tournois Natural Gut gives me great control and power. It is
ideal for players looking for control without losing power.
From: Zach, Pittsford, NY. USA 3/01
Comments: I bought these strings cheaper than the usual price and I found
them really good for control. I would not normally buy expensive strings like these although I
really enjoy natural gut. This is a good natural gut but not as good as the VS Power also from
Babolat. I tend to prefer a string like the Gamma TNT than a string like the Tonic Natural Gut.
From: Sylvain, Paris, France 3/01