what kind of shock absorber does roger federer use?

Roger Federer doesn’t reportedly use a shock absorber on his tennis rackets. He brings 9 rackets to each match that range from 48-52 pounds in the vertical main strings (and 3.3 pounds lower for his cross strings). The vertical main strings are made of gut and the cross strings are a synthetic brand called Luxilon Alu Rough. Federer tends to use 7 or 8 rackets during a 5-setter generally going tighter as a match progresses.

Federer recently won 6-3, 6-4 against Nadal in the semifinals of the 2012 BNP Paribas Open. Federer defeated John Isner 7-6(7), 6-3 to win his 3rd title of the year and a record 4th BNP Paribas Open title. He went home with a check for $1 million. Isner earned $500,000.