Comments: Best string I have ever played with. I used to use 515 back in the day and this reminds me of them. I've tried many other brands and always keep coming back to these.
From: Lambert, 5/13

Comments: Great string! Excellent feel and ball pocketing, and has the pride to snap before it goes too far south in terms of playability from loss of tension. That said, it isn't the most durable string at all. But, I like that it kind of lets you know it's going to break before it breaks (fraying) without it affecting playability too much. I wish it were half the money, because I go through it pretty quickly, but it's a great string that worked well in my 18x20 BLX Blade 98 strung at 58lbs.
From: Mike, 5/13

Comments: I strung it as a cross string with BB Ace in the mains. I used it on Tuesday and I have to say it felt great. It has a cushioned feel, increased power and touch shots were working very well. I played a 2 hour singles match, followed by about 3 hours doubles over 2 days, and the string snapped within 10 minutes of hitting. It started to fray after the singles match. I'm a fairly heavy hitter with moderate spin, but as nice as it felt, I still need much better durability than 3-4 days. I now have the joy of re-stringing my racquet again. Try Isospeed Professional Classic as an alternative, as it's somewhat stiffer, but lasts a lot longer.
From: Jonathan, 12/12

Comments: Wow, do I like this stuff! Good power, good feel, good spin, good control, easy to string. I was always an MSV guy but this string plays much better and is now my new favorite string.
From: Jethro, 8/12

Comments: Soft buttery feel but with power to spare and spin on demand. Holds tension well, even when it is fraying and looking a little rough, it remains durable and still plays great. Good control for a multi and even better on a tighter string pattern. Highly recommended. Excellent for arm issues. (Volkl PB10 @ 55)
From: Jay, 6/12

Comments: I just tried this instead of my usual Wilson NXT Tour 17. Had it strung at 60 lbs in my Wilson BLX Juice 100. It played great (feel, power, control) but frayed very badly within two weeks. The NXT usually last 6 - 8 weeks before fraying.
From: Jeff, 4/12

Comments: I have been using this NRG2 string exclusively for the past 8 years or so. I love playing with it and the durability has been pretty good until the last year or so. Now I'm going through strings in 3-4 weeks, whereas it used to be 5-6 weeks (playing 3-4x per week). I am getting fed up with the cost and bother of restringing all the time, so am now looking to find something with more durability.
From: VICTOR, 2/12

Comments: This is a very good string in a full bed or in the mains with another string in cross like Wilson NXT 16. I have strung it at 51 lbs in my Head Youtek Extreme MP and I got great feeling, power, comfort and spin. The NRG2 is crisp but it offers also a good ball pocketing. Not too soft and not too stiff. Just perfect balance and it keeps very well the tension as multifilament string. It will last on my open pattern 16 x 19 for maximum of 8 hours but there is a compromise for quality, it is the price. I invite you to check the learning center of Tennis Warehouse on data comparison of string and you will learn a lot about different string.
From: Gilles, 11/11

Comments: I like this string as a hybrid with it in the crosses and Gamma Live Wire 17 gauge in the mains. What a feeling, like gut all the way around. String it 2 lbs more to keep the tension, you will be surprised the combo of this set up.
From: Patty, 9/11

Comments: I can describe this string in one word: wow. I have some tennis elbow and I barely feel any stress or pain in my joints now. The strings have a nice pop to it, really good with spin, and has loads of feel. If you like synthetic, try this. If you like natural gut, try this. If you like to hybrid with poly, try this. There's a reason why these strings were named best strings in 1999, hats off.
From: Rohit, 8/11

Comments: I've been hooked on this string for nearly two years and am reluctant to try anything else. The combination of power, comfort, and control is worth the trade-of in durability. I'm a 4.0 and play about 8 hours a week and these strings will start to fray after about two weeks. At 60 lbs. tension, these strings offer the perfect combination of pop and spin in my Dunlop 200 g XL. If you want better longevity, I suggest the 16g, but there's a surprising trade-off in feel and responsiveness. For some reason the 16 at the same tension just doesn't feel as lively.
From: Hugh, 8/11

Comments: I have tried quite a few strings in the last couple months and this is my favorite string ever! I started with a couple different 17ga. poly strings. I was getting a ton of spin but my shoulder started getting sore. After reading posts on a zillion different strings I had this put in my Volkl Power Bridge 9 @ 54 lbs. I am getting at least as much spin, the feel is perfectly crisp with little to no vibration. It has the right amount of power and my shoulder has completely stopped hurting. What else can I say.
From: CJ. 5/11

Comments: Really like this string (17g NRG2). I still play with 2 Head Prestige Classics (93 sq inch headsize) and have one strung with X-One Biphase 17g and one with NRG2 - both strung @48 lbs. I like the way both play - and to my mind they both play pretty similarly - though if pressed, I'd say that the racquet strung with X-One Biphase may be just a smidge more lively. Hard to say really - as the small difference could be due to the frames as they are the same racquet but not "matched" and one is a year or 2 older than the other. In any event, when I re-string I may switch the string in the 2 frames in order to try to isolate the very slight difference in the way the 2 racquets play.
From: Anon. 4/11

Comments: This is my string of choice. I fell in love at first hit. If you prefer multifilament strings (as I do) it really doesn't get any better than this. I must say if comfort is your number one goal then maybe X-1 biphase is a better choice, That being said I string tight and like some pop from the string bed and this string gives my the blend of comfort and pop without the mushy feeling of Biphase or stiffer feeling of Klips excelerator, Both are great strings but not what I was looking for. Durability is average for a multi but the playability more than makes up for it. You really can't go wrong with this string if you're looking for any of the properties mentioned. 5 star A+++ stings Becker Delta Core Legend @62lbs
From: Dallas, Sonoma, CA, USA, 02/11

Comments: I use this string on a Babolat Z 110 racquet. As I am in my 60's and have had wrist surgery this is a great combo to reduce vibration. I play 4.0 tennis and still generate reasonable pace but have found that this combo helps me to hit hard with less effort. This string will impart energy to the ball with excellent spin. If you are still just banging the ball you may not like this string, but if you have found success with finesse and can't afford natural gut this is your string. It is exceptional. NRG 17 strung at 53 lb.
From: Chuck, Tucson, AZ, USA, 11/10

Comments: Used it in combination with Tecnifibre Spinfire on Babolat Pure Storm and later on the Aero Storm for about 7 years. Unbelievable feel and pin-point control, easy on the arm. Problem is, it loses tension after 4-5 hours of play and it frays quickly. I have just recently switched frames and found that this string is a bad match for Yonex RQIS Tour frame so I stopped using the string. If the constant restringing doesn't break your bank then this string is definitely the closest you could get to the natural gut feel.
From: Adi, New York, NY, USA, 09/10

Comments: Great string! I hybrid this with the MSV poly 17g @ 50lbs on the main and the NRG 17g cross at 54 lbs on my Fischer Progressor. Feel is great and it pockets the ball really well. The control of the shots and feel are great as well. Try the NRG and you'll like it!!
From: Anon. 12/09

Comments: This is the best string I've used to date (and I've gone through plenty). The string has great feel and pop. It does have the tendency to fray but it's not that big of a problem. I string my Babolat Pure Drive GT with it at 62 lbs and it seems to last a decent length. Going to try and use it as a hybrid to see if I can get a cheaper string set up cause I don't want to pass up this string.
From: Neil, San Antonio, TX, USA. 11/09

Comments: Great string for the price. Feels like natural gut w/o taking a loan out. For players that does their own stringing, this is the best string for the money PERIOD!!! The one drawback is that it loses it's tension quickly (after playing 4-5 matches). You will love the feel after a string job.
From: Ben, Buffalo, NY USA 08/09

Comments: I ordered a bunch of different strings at the beginning of the year just to see what I'm most comfortable with. After trying out the T.F. NRG2 17, this is definitely my fav string and soon I'm going to purchase a reel.
From: Mike, Toronto, Canada 08/09

Comments: This string has great feel and pop. I think that my mistake was to use it in a hybrid with polyester strings. I can usually get a couple of months out of a set of strings and I've only been able to get about 6 sets of play out of this stuff. Even though the durability is lacking in my opinion the feel is fabulous.
From: Paul, UT, US 07/09
String and Tension: Tecnifibre T-Fight 320 VO2 Max strung in a hybrid with Pro Red Code 16 in the mains at 58 and NRG2 17 in the crosses at 61

Comments: This is by far the best string I have ever used. I used to be a big believer in Wilson but decided to string this in my Prince Rebel 95 and it was the best decision I have ever made. This string provides great spin and you can really wail the ball. It has a lot of pop and is very soft. A++++++ from me.
From: Brandon, East Lansing, MI, USA. 3/09

Comments: I thought the string held tension well and durability was fine at least for me. Lasts less than a month, which is lower than some polys like Unique Big Hitter. String wasn't too soft or firm. It will start to fray but it held up well. Worth trying out.
From: Lk. 1/09

Comments: I'm a believer! What a great string! I have been using Prince Synthetic Gut Duraflex 16 for years. I recently purchased a new racquet with Tecnifibre NGR2 17 in it. I bumped up the tension 2 lbs, and wow! I can't believe how this string feels. I used it for 1 hour on a ball machine to break it in, and then played a 1.5 hour singles match. Tension has stabilized and shows no sign of dropping further. Spin is fantastic, and is a bit more powerful than the Prince Synthetic Gut. The power is deceiving because of the increase in spin, thus keeping the (heavier) ball in play. Durability has yet to be determined. After 2.5 hours of play, they show no signs of threading or biting. The string is much more comfortable now that it is broken in. It's not as soft as the Prince string, but gives better feedback. I will be looking forward to getting a reel and making a permanent change in the next few weeks.
From: Ned, Vienna, VA, USA. 1/08

Comments: Great String if you are not a string breaker. I broke this string in 4 days on my Dunlop M-Fil 300. However the playability was great. I am now going to try to see if I get better durability from the 16 gauge version. I string my racquets at 62 pounds and I play NCAA Division 3 Tennis in college.
From: Danny, CA, USA. 7/07

Comments: Great string to use on the Tecnifibre t-fight 325 with the tight string pattern. Very good ball control, spin, pace, and the strings feel very solid strung around 60 lbs. The only downside is they break quick. I'm only 14 but serve around 100 and use moderate topspin but they still broke in nearly one month.
From: Nicholas, FL, USA, 03/07

Comments: Had these strings strung on 60 Lbs tension. Was very powerful and generated quite a descent amount of spin. Has not lost tension yet and it's been about 4 hours. Shows signs of breakage but held up pretty well. A little bit too powerful for me so I'll try the new Gamma Asterix stings. Would recommend for power however.
From: Terry Kuo, NJ, USA. 3/07

Comments: Very good string! Good feel, it's soft but not too soft to where strong flat groundstrokes or strong volleys do not have some pop to them. Strung in a Dunlop M-Fil 200 @ 61lbs. I've only played with them a few times, 2-3 hours each time, but so far not a very noticeable amount of tension loss and no fraying yet, which is good for me.
From: Trey, Augusta, GA, USA, 02/07

Comments: Great string. Plays very similarly to gut. Incredible feel in a Babolat PD Roddick. Generates lots of spin. Very comfortable on the arm. I'm going to try a hybrid with ALU Power 16L or Babolat Pro Hurricane Tour.
From: Jerod, Washington, DC, USA 09/06

Comments: The NRG2 is an amazing string hands down! NRG2 gave me a ton of spin and great control when hitting. Another plus is that these strings pocket really well. The bad news is that I will be using polyester strings again for their longer life span.
From: Eric, Los Angeles, CA, USA 07/06

Comments: I put it on Babolat Aeropro Control @ 60lbs. Wow I'm very impressed, it feels great on your arm, generates power, control and spin. Durability benefits and Affordable price.
From: Reynaldo, Philadelphia, PA, USA. 1/06

Comments: This would be a very good string if it held tension more consistently. Initially it offers fantastic power, feel, and touch, but about a week later it becomes unplayable due to enormous tension loss. This might be a good string of choice for 3.0 or below. Other than that, I really can't recommend this string. I'll try the X-One Biphase.
From: Fred, USA. 9/05

Comments: I am number one in the country in boys 12's and I love this string. It has unmatched feel except vs gut which is too much too pay for. It does fray, if you hit top though.
From:Jack, Lincoln, NE

Comments: Very good string, but yes it does fray and break really quick, I strung it oh my Dunlop 200g XL and it had very good spin and control but it frayed probably 1 week after playing, which would be maybe my 3rd day of playing with it. So if you are a heavy top spinner I would not recommend it, with all that said I ordered another set of these strings I just love the control and feel!
From: Moses, Modesto, CA, USA

Comments: Plays like gut but there wasn't enough comfort for me here. Great string if you want a string that's similar to gut.
From: Dave, Boise, ID, USA. 05/05

Comments: I currently use the NRG2 17 on my Dunlop 300G at 55lbs. It's been a good string overall but nothing extraordinary. I guess my expectations were very high given all of the praise I've read on this board. I last used a Tecnifibre string many years ago and it looks like they've improved the fraying problem. On my other 300G, I use Ashaway's Vantage Pro 17 which compares quite nicely in terms of power and feel. Also, the Vantage Pro 17 is a bit less expensive.
From: Gil, Burbank, CA, USA. 12/03

Comments: This is a great string. A solid combination of power, feel, and durability makes this my string of choice. I'm an all-court 5.0 player who strings his i.Prestige at 56 lbs.
From: Damion, Los Angeles, CA, USA. 10/03

Comments: This is a great string that offers a great balance of feel and durability. This is now my string of choice after it has outlasted my other favorite multifilament (Babolat X-Cel premium 17).
From: Damion, Los Angeles, CA, 10/03

Comments:I've used Tecnifibre NRG2 17 and found it to have very good playability, endurance and overall performance. It is an excellent choice for those players who demand good performance. I found it a better choice that Wilson Sensation or NXT. I also like some of the Gamma strings. It seems that I'm always searching for that perfect string. I was considering making this Tecnifibre the string that I would settle down with and use. However, I stumbled on another string that is without doubt the best I've ever experienced. I have found my string, it's called Babolat Powergy 16. It is amazing! I'm an all-court player. I've been playing tennis about 15 years. I play two or three times a week and use the Head Intelligence i Prestige mid.
From: Stephan, Greenville, SC, USA. 9/03

Comments: I have to admit that this string gives a ton of power. However the power doesn't last very long. It also frays and gets all fuzzy. I would recommend the 16 instead.
From: Curtis, Sugar Land, TX, USA. 6/03

Comments: I have been using Tecnifibre NRG2 SPL 17g string in my Pro Kennex 5G racquets for the last 2 years. I find that it plays best after it breaks in and begins to fuzz or fray. You have to hit the shine off the strings! It seems that the feel and spin quality improves with use. Of course when it's at it's peak you break a string. The feel is closer to gut than anything else I've used, but if you can afford it there is nothing like gut. I'm a 4.0 senior player that plays 3 to 5 times a week.
From: Frank, Cleveland, OH. USA 12/02

Comments: This is an ok string if you are not a chronic string breaker. It lasted about 1.5 weeks in my Wilson Pro Staff 6.0 Original. I did like it in the first 2 days but then it began fraying uncontrollably. I like to serve and volley, but when I am just practicing I hit with heavy topspin. I am a 4.5 all court player, and would say if you can afford it all the time go for it.
From: Alex, Cleveland, OH. USA 11/02

Comments: I do NOT like this string at all - too stiff and not the control that I expected, poor durability even with string savers which then make it even less responsive. I am a 4.5 all-court player.
From: Jennifer, Trinidad, CA, USA 7/01

Comments: This string is probably the best synthetic gut on the market. It provides good control, spin, and feel. It also offers better durability then Wilson Sensation NXT 16 or 17 gauges. The strings work best on midsize/plus racquets the best.
From: KJ, Seattle, WA. USA 4/01

Comments: I have used Wilson Sensation NXT 17 for about one year and been reasonably satisfied but as the string ages the control drops off. After reading that Tecnifibre NRG2 SPL 17g was a real good feeling string but questionable on durability I tried a hybrid of Wilson NXT 17 on the mains strung at 64 and Tecnifibre SPL17 on the cross strings strung at 62. My Head Radical came to life, on ground strokes I could swing out and keep the ball deep but in the court, on serves and volleys the control and pace both increased. Overall I am very pleased with this string mix.
From: Charles, Mendon, MA. USA 4/01

Comments: Tecnifibre NRG2 SPL17 is one of the best playing synthetic guts available on the market. NRG2 offers great feel, control, and spin. Seems to offer a little better than average durability compared to other synthetics. Very easy to string with lubricated coating. This string is definitely the next best thing to natural gut.
From: Charlie, NYC. USA 12/00
Racquet type: Head Ti Radical
Playing level: NTRP 5.0 all-courter

Comments:ProKennex gave me four sets of Tecnifibre NRG2 SPL 17 String after I returned my two defective ProKennex 5G racquets for replacement. As a test, I strung one racquet with Prince Soft Synthetic (17 gauge) and the other with the NRG2 17 gauge, both at 60 pounds. Initially, they both played well (and similarly), but in less than 2 weeks, the NRG faded--it lost control (crispness). After 6 weeks, the NRG2 was not playing well at all. I play at the 3.5-4.0 level.
From: Mike, Richland, Wa. USA 11/00
TW note: Tecnifibre NRG2 SPL 17 is a multifilament constructed string. Multifilament fibers do tend to break down sooner than regular synthetic guts with a solid inner core (such as Prince Synthetic Soft 17g.), affecting string "feel" and elasticity. As is often the case however, a multifilament string like NRG2 SPL 17 will, in most cases, give a much better level of playability in the first few weeks. Nothing new here - playability vs. better durability.

Comments:I used Tecnifibre NRG2 SPL 17 String on a Longbody Prince ThunderStick, strung at 63 pounds. Had a great feel in the beginning, and an even greater feel after it was broken in. Great spin, power, and sensitivity. Breakage occurred after 3 weeks, fraying after the first couple of days. Definitely worth the money if you can afford it.
From: Tammy, USA 10/00

Comments:I tried Tecnifibre NRG2 SPL 17 String recently. When I first began hitting (with my Head Radical Ti) I thought it was the best string in the world. It felt like natural gut and gave the feeling of cupping the ball and then catapulting it toward the target. I was so impressed I ordered a few more sets. The shine soon faded, however, and in a few more hours of playing time, I felt the string was soft and mushy. The great playability that was so impressive initially vanished. I cut the strings out and went back to my old lover--Gamma TNT Pro Plus 17L--and have promised myself I'll never change again.
From: Randall, Binghamton, NY. USA 3/00