Federer likes to change his racket at the same time the balls are replaced. (This occurs after the first seven games of play and every nine games thereafter.) Problem is, he doesn’t like to serve when he uses his new racket for the first time. He had done the math in his head and determined he’d better swap sticks now or he’d be left serv ing with a new racket. Even in the guts of a Wimbledon final, his mind is fixed on order and organization.
