Djokovic outserves Isner to win Miami Open semifinal (Yahoo Sports)

Two hours before the Miami Open semifinal, Novak Djokovic practiced his returns in an empty stadium, the ball coming at him quickly because his hitting partner stood three feet inside the baseline to emulate big-serving John Isner. Djokovic achieved a breakthrough service break against Isner and won Friday night, 7-6 (3), 6-2. ”He’s probably the best server we have in the game,” Djokovic said. His opponent Sunday will be two-time champion Andy Murray, who defeated Tomas Berdych 6-4, 6-4.