What a day for men’s tennis. Roger Berdych, the sixth seed, beat the top seeded Roger Federer in a stunning upset in the quarterfinals, winning 7-6 (1), 6-4, 3-6, 6-3. Berdych will now go on to the semifinals, where he will face Andy Murray, who almost lost in the quarterfinals on Wednesday. “There is no better feeling,” Berdych said. “There is no better moment than this one.” For the first time in recent memory, the U.S. Open is wide open, with Federer and Andy Roddick out and Rafael Nadal having withdrawn due to a knee injury.