A day after Victoria Azarenka collapsed on court during a singles match at the U.S. Open, she and partner Dinara Safina pulled out of women's doubles. Azarenka and Safina originally were scheduled to face the ninth-seeded pair of Cara Black and Anastasia Rodionova in the first round of doubles Thursday.

Fifth-seeded Robin Soderling has won his second-round match at the U.S. Open, defeating Taylor Dent 6-2, 6-2, 6-4. Soderling, who has reached the final at the French Open for two straight years, needed five sets for his first-round victory at Flushing Meadows but had a much easier time with Dent on Thursday.

Qualifier Kei Nishikori of Japan has upset 11th-seeded Marin Cilic at the U.S. Open in a five-set marathon that took a minute short of five hours with temperatures in the mid-90s. Nishikori won Thursday's second-round match 5-7, 7-6 (6), 3-6, 7-6 (3), 6-1. Two years ago, he reached the fourth round to become the first Japanese man to get that far at the U.S.

Five-time champion Roger Federer has breezed into the third round at the U.S. Open, serving 15 aces in beating 104th-ranked Andreas Beck of Germany 6-3, 6-4, 6-3. Beck double-faulted 11 times on Thursday, Federer zero. Federer has won 42 of his past 43 matches at Flushing Meadows, the only loss coming in last year's final.

Richard Gasquet has helped France improve on its strong U.S. Open showing with a 6-3, 6-4, 6-2 upset over sixth-seeded Nikolay Davydenko of Russia. Gasquet, ranked 38th, moves onto the third round. Even before Thursday's match, he was helping make history -- one of a record 12 Frenchmen to make it to the second round at Flushing Meadows.

Pro tennis' leading doubles champions, Bob and Mike Bryan, are identical twins who are so coordinated on the court that their opponents ...

Pro tennis' leading doubles champions, Bob and Mike Bryan, are identical twins who are so coordinated on the court that their opponents ...

Top-seeded Caroline Wozniacki has defeated Chang Kai-chen of Taiwan 6-0, 6-0 to advance to the third round of the U.S. Open. Wozniacki needed only 47 minutes in Arthur Ashe Stadium on Thursday to put the "double-bagel" on Chang. The Dane won 52 points to only 24 for her opponent, and has lost only two games in her first two matches at Flushing Meadows.

American Mardy Fish has advanced to the third round of the U.S. Open with a 7-5, 6-0, 6-2 victory over Uruguay's Pablo Cuevas. The 19th-seeded Fish finished third in this year's U.S. Open Series and would make a $250,000 bonus if he wins the U.S. Open. With Andy Roddick eliminated in a match late Wednesday night, Fish joins No.

Wimbledon runner-up Vera Zvonareva beat 94th-ranked Sabine Lisicki of Germany 6-1, 7-6 (5) Thursday in the second round of the U.S. Open. The No. 7-seeded Zvonareva now has made it to the third round at Flushing Meadows in seven of her eight trips to the tournament. But the Russian never has made it to the U.S.

Andy Roddick found it infuriating that a lineswoman who called him for a foot fault was wrong about which of his shoes touched the line. The 2003 U.S. Open champion had much bigger problems Wednesday night at Flushing Meadows, though, and bowed out in the second round with a 3-6, 7-5, 6-3, 7-6 (4) loss to 44th-ranked Janko Tipsarevic of Serbia, whose go-for-broke style paid off with 66 winners.

Melanie Oudin can show up at next year's U.S. Open back as the up-and-coming teenager just hoping to win some matches. The darling of the 2009 Open acknowledged relief Wednesday after her run ended this time after only two rounds. Oudin's opponent was the one who was seeded, but the 18-year-old felt the pressure of the favorite in front of the big crowd of Louis Armstrong Stadium.

Wimbledon runner-up Tomas Berdych never found his rhythm against the rarity of the serve-and-volley style of Michael Llodra. The seventh-seeded Berdych lost in straight sets in the first round of the U.S. Open on Wednesday. Llodra, ranked 35th and known more as a doubles player, won 7-6 (3), 6-4, 6-4. "I don't even know if I played well or not," Berdych said.