Novak Djokovic advanced to the Sony Open final when Kei Nishikori withdrew less than two hours before Friday's semifinal because of a groin injury. Nishikori won a grueling three-set match against Roger Federer on Wednesday night and also won a three-setter against David Ferrer in the fourth round, when he saved four match points. The No. 2-ranked Djokovic will bid for his fourth Key Biscayne title Sunday against the winner of Friday night's match between No. 1 Rafael Nadal and No. 7 Tomas Berdych. More...