Two men pull strings to make players rackets' fresher
ATP World Tour Finals tennis - Inside Roger Federer's racket science - ESPN
Wilson Federer Power Strings Tennis Racquet Racket Orange Black 4 3/8 grip | eBay
Frugal Federer – PEEK Tennis
Wilson Roger Federer 110 Tennis Racquet Racket Power Strings Red White L4 4 1/2 | eBay
Federer, Nadal and Djokovic- Racquets and Tensions - EssentiallySports
WILSON ROGER FEDERER 21 TENNIS RACQUET RACKET POWER STRINGS 3 1/2”L000 w/1 Glove | eBay
Amazon.com : Wilson Federer Pro Staff Precision XL 110 Gloss Red Tennis Racquet in Grip Size 4 3/8" Bundled with a Black Advantage II Tennis Bag (Incredible Feel and Control) : Sports & Outdoors
Roger Federer on Twitter: "Today is the official debut of my new @WilsonTennis #RF97 racket. Been really looking forward to this! #sweetstix http://t.co/Xu9SwBYPd5" / Twitter
Roger Federer playing Luxilon Strings @LXNstrings - YouTube