seeded John Isner upset top-seeded Andy Roddick 7-6 (7), 6-4 Friday in the semifinals of the Winston-Salem Open, a final warmup tournament before the US Open. Isner won the first set in a tiebreaker by breaking Roddick's serve to go up 8-7. He ended the set with a 107-mph (172-kph) serve. The 28th-ranked Isner will play the winner of the match between Robin Haase and qualifier Julien Benneteau in Saturday's final. The 21st-ranked Roddick, who had been 8-0 in his career in Winston-Salem, broke Isner in the second set to go up 3-1. But Isner came right back to break Roddick in the next game. Level at 4-4, Isner got another break to go up 5-4 and had three aces to end the match. Roddick had crushed seventh seed Juan Monaco of Argentina 6-1, 6-4 in quarters Thursday, while fourth seed Isner recovered from a shaky start to beat eighth-seeded Cypriot Marcos Baghdatis 1-6, 6-3, 6-4. In the other quarterfinal matches, Bennetau rallied to beat Sergiy Stakhovsky of Ukraine 3-6, 7-6 (9), 6-2 and 10th-seeded Robin Haase of the Netherlands beat Ukraine's Alexandr Dolgopolov 6-4, 6-4 in a match that lasted an hour. Wozniacki, Li advance Top ranked Caroline Wozniacki cruised into the next round and China's Li Na had to endure a rain delay before booking her spot in the semifinals of the New Haven Open Thursday. Wozniacki remained undefeated advancing with a 7-5, 6-3 win over American teenager Christina McHale. Three-time defending champ Wozniacki has a perfect 15-0 career record at the annual final tournament before the US Open, which begins in four days. China's Li endured several hours of rain delays before advancing with a 6-4, 3-6, 6-2 quarterfinal victory over Russia's Anastasia Pavlyuchenkova. Li will play Czech qualifier Petra Cetkovska who beat fourth-seed Marion Bartoli 7-5, 7-5. Wozniacki will face third-seeded Francesca Schiavone, who advanced without hitting a shot after Anabel Medina Garrigues withdrew due to a knee injury. Medina Garrigues, who was seeking a third title of 2011, fell to the ground and grabbed her knee after failing to convert a third match point in the second set of her 6-2, 7-6 (7/5) victory Wednesday.
