WIMBLEDON, England (AP) -- When Roger Federer misfired on an important shot Friday, his knees buckled and he stomped behind the baseline, miffed at his mere mortality. The moment quickly passed, and Federer advanced to the second week at Wimbledon by beating Philipp Kohlschreiber 6-3, 6-2, 6-7 (5), 6-1.
Federer lost a set for first time this week, with two errant forehands costing him the tiebreaker. That merely extended his Centre Court workout by half an hour.
