DEFEATING FEDERER Novak Djokovic after his five-set victory over No. 3 Roger Federer in their semifinal match Saturday at the United States Open.Djokovic rallied from a two-set deficit for only the second time in his career for a 6-7 (7), 4-6, 6-3, 6-2, 7-5 win. He will face the defending champion Rafael Nadal on Monday in a rematch of last year's Open final.