String Check: USTA National Clay Courts 12s

Last entry I discussed the rackets that some of the best 12 and under tennis players in the United States used at the USTA National Clay Courts. But as my friend Tom Parry of Pacific has often said, “rackets are just string holders.” So what types of strings did we see? Through the first three days, it looked like this:

All Multifilament –23.5%

All Synthetic Gut –12.0%

HYBRID –35.3%

All Monofilament –29.0%

These string combinations are listed from “hardest” to “softest” in terms of the feel of the string and the amount of shock that is transmitted to the players arm. (Operationally, the United States Racquet Stringers Association defines the “stiffness” of a string as the pounds of force per inch necessary to move the string. This ranges from the softest gut at 88 to the stiffest Kevlar at over 500. Most multifilaments are in the 180-200 range, synthetic guts are in the 200-220 range, and monofilaments range from 220 to over 300.)

The stiffness of the player’s stringbed is a big concern. I know many people who have developed wrist or elbow tendonitis from using strings that are too stiff. I worry about the long term consequences on a kid’s arm of using very stiff strings from a very young age. I advise my customers – regardless of age actually — to use the softest string possible, and only move to harder strings when they begin to break strings more frequently than they can afford.

I was happy to see, therefore, that less than a third of the players were using all monofilament string jobs and slightly more than half were using all multifilament or all synthetic gut strings. The largest group of players were using hybrid strings (stiffer monofilament strings on the mains and softer strings on the crosses), which is a good compromise for people who play and break strings frequently.

Interestingly, one of the tournament sponsors, Babolat, gave each player a free pack of RPM Blast 17g. That is 128 sets in total, which is quite generous. I am not certain, however, that it is a good idea for 10, 11, and 12 year olds to be using all-RPMs. I often hear people characterize RPM as a “soft poly.” It is actually a very stiff sting (rated at 280 pounds). What people react to, I believe, is that it is more elastic than other earlier generation monofilament strings, giving it better “feel.” But the fact that it has more elasticity doesn’t mean that it won’t transmit a good deal of shock to the arm of a 11 year old kid. I just strung a Babolat Pure Drive with RPM at 62# and wonder about the long term effect of that on the player’s physical well-being. He did complain about shoulder pain after one of his matches and said (joking perhaps, though perhaps not) that he was going to drop 10# on his rackets after the tournament.

Speaking of tensions, almost one-quarter (23.5%) of all of the players we strung for were at 59# or higher, though some of those were stringing with all multifilament strings. The same proportion were stringing at 54# or lower, which I think is a good ceiling for most players (sting low!). No player strung below 50#, though. The majority of players strung between 55# and 58#, with the single most popular tension being 55#. In general, I found the string tensions reasonable in combination with the types of strings people were using.

In the end, I would say the “typical” racket being used by the players at this tournament was a Wilson with hybrid string job at 55#.

The most unique request was for a 9 year old player using a Wilson K-Blade junior model. The mother dropped off the racket and said she didn’t know the tension range, so I was going to string it at the middle of the range with a Gamma multifilament. She came back a moment later and said the kid’s coach texted her the tensions for the racket: 51.5# on the mains, and 50.5# on the crosses!

Bag Check – Jan 27 – Wake Forest Men’s Tennis

Wake Forest’s men’s tennis team is getting ready to head to Lexington, KY this weekend for the National Team Indoors qualifying against Minnesota, and then the winner of Kentucky vs. Michigan.

Wake’s team has an exclusive deal to play Pacific strings and the players use seven different Pacific strings in their set-ups.

Here is what the guys will be carrying with them for these matches (tensions are on an electronic constant pull machine; if two strings, the first string listed is main string and second string listed is cross string):

Steven Forman – Head Liquidmetal Prestige MP
Pacific X-Force 18g and Pacific Power Line 16L (62#)

Carlos Salmon – Babolat Pure Drive Roddick
Pacific Poly Force 16L (60#) and Pacific DuraTech 16 (60#)

Jason Morgenstern -Babolat Pure Drive Roddick
Luxilon Big Banger Alu Power 125 (64#)

Iain Atkinson – Babolat Pure Drive Roddick
Pacific Poly Force 16L and Pacific Power Line 16L (58#)

Jon Wolff – Babolat Pure Drive Roddick GT
Pacific Poly Force 16L (59#) and Pacific Poly Power Pro 16L (57#)

David Hopkins – Wilson K6.1 95 (18×20)
Pacific Poly Force 16L and Pacific DuraTech 16 (53#)

Chad Brady – Head Microgel Prestige MP
Pacific Poly Force 16L and Pacific Power Line 16L (53#)

Tripper Carleton – Wilson K6.1 Tour
Pacific Poly Force 16L and Pacific DuraTech (53#)

Danny Kreyman – Tecnifibre T-Fight 320
Pacific Poly Force 17 and Pacific Power Line 16L (45#)

Zach Leslie – Babolat AeroPro Drive GT
Pacific Poly Force 17 (45#)

Amogh Prabakar – Babolat Pure Drive
Pacific Poly Force 16L and Pacific Poly Force 17 (57#)

Conner Sherwood – Babolat Pure Drive
Pacific Poly Force 16L and Pacific Power Line 16L (59#)

Stringing at Barclay’s ATP World Tour Finals

Big Time Tennis’s Pacific guy, Tom Parry, blogged from London at Tennis Week ( during the ATP World Tour Finals. The blog is appropriately titled “Behind the scenes, from behind the machines.”

Tom was also interviewed from the stringing room for the official website.…

Interesting factoid from the blog and interview: Davydenko stringing the mains one tension (21k initially, the first five crosses another tension, 17k, then the rest of the crosses a third tension, 19k). This may have something to do with the O-ports on his Prince racket starting on the 6th cross down.

Also, check out the post from Day 9 that discusses and shows pictures of Robin Soderling’s handle, pictured below.

Tournament Stringing Log from French Open

Paul Kid of Tecnifibre reports the following stringing information from Roland Garros, where Tecnifibre is the official stringer, in the July 2009 issue of Racquet Sports Industry magazine:

-Total frames strung: 3,060 (up by 300 from 2008)
-Lowest tension: 22# for Filipo Volandri (Italy)
-Highest tension: 77# for Jurgen Melzer (Austria)
-Most racquets strung: 52 for Serena Williams

Tensions for notable players:
-Rafael Nadal: 55#
-Robin Soderling: 56#
-Dinara Safina: 66/64#
-Svetlana Kuznetsova: 57/55#
-Fernando Verdasco: 51/46#
-Mike Bryan: 50/53#
-Bob Bryan: 49/53#
-Andy Roddick: 62#
-John McEnroe: 52#

Notable to me is — with a couple of exceptions — how low these professionals string compared to the average college and amateur players I’ve strung for. I’ve posted about this before in examining pro stringing logs.

Pro Tournament Stringing Logs – Aegon International Eastbourne

Stringing logs from the finals of the Aegon International grass event at Eastbourne, posted by stringing team manager Liam Nolan on Grand Slam Stringers message boards:

Women’s Singles:
Virginie Razzano (France) – Head Prestige – Vs one-piece RTW @ 25.5k
Caroline Wozniacki (Denmark) – Babolat Aero – Mains Babolat Red, Crosses VS @ 25k.

Men’s singles;
Frank Dancevic (Canada) – Wilson K Blade – Mains Big Banger Alu Pwr, Crosses VS @ 18k.
Dmitri Tursunov – Wilson K Blade – mains are Big Banger Ace 112 and Alu Pwr crosses @ 49lbs.

Ladies Doubles;
Samantha Stosur (Aus) – Bab Pure Storm – mains Big Banger Alu Pwr @ 62lbs, crosses VS with pre-stretch @ 53lbs.
Rennae Stubbs (Aus) – Bab Pure Storm – mains are VS with pre-stretch, crosses Bab Red @ 56lbs.

Their opponents;
Akgul Amanmuradova (Uzb) – Bab Pure Drive – Pro Hurr one-piece @ 28/27k
Ai Sugiyama (JPN) – Prince O3, mains Recoil @ 50lbs, crosses Prince gut – pre-stretch @ 52lbs.

Not surprisingly, alot of Luxilon and Babolat VS gut hybrids. Interesting to see some of the Babolat players using the red “Revenge” string. Haven’t seen or heard much about it, but I’m sure it will be big with the Babolat name behind it.