what weight does federer use
After Federer signed off on the RF 97 Autograph, Wilson engineers designed two lighter models: the Pro Staff 97 and the Pro Staff 97 LS. Cosmetically the same, the rackets have minor but crucial differences. The Pro Staff 97 has an unstrung weight of 315 grams (11.1 ounces).
Most amateur players would not play well with Federerâs racket. The RF 97 Autograph weighs 340 grams (12 ounces), about 40 more than most consumer models. This enables players to drive the ball, but over the course of a match, it could cause late swings or muscle fatigue.