Federer warns rivals, top women fall

Roger Federer warned his rivals that he had yet to produce his best form at the French Open despite striding into the quarter-finals with a clinical 6-3 6-2 6-3 victory over Czech Tomas Berdych on Sunday. Federer meets Croatian 12th seed Mario Ancic, who was the last man to beat the Swiss on grass at Wimbledon in 2002.