Roger Federer (red shirt), of Switzerland, serves to Radek Stepanek, of the Czech Republic, during their match at the U.S. Open tennis tournament in New York, Sunday, Aug. 31, 2008.
Top-seed Ana Ivanovic, of Serbia, reacts during her 6-3, 4-6, 6-3 loss to Julie Coin, of France, at the U.S. Open tennis tournament in New York, Thursday, Aug. 28, 2008.
Serena Williams, of the United States, celebrates after defeating Ai Sugiyama, of Japan, 6-2, 6-1, at the U.S. Open tennis tournament in New York, Saturday, Aug. 30, 2008.
Andy Roddick, of the United States, jumps as he returns to Fabrice Santoro, of France, at the U.S. Open tennis tournament in New York, Wednesday, Aug. 27, 2008.
Mardy Fish, of the United States, serves during his match against James Blake, also of the United States, at the U.S. Open tennis tournament in New York, Saturday, Aug. 30, 2008. Fish won 6-3, 6-3, 7-6 (4).
Kei Nishikori, of Japan, falls to the court and celebrates after defeating David Ferrer, of Spain, in five sets during their tennis match at the U.S. Open in New York, Saturday, Aug. 30, 2008. Nishikori won 6-4, 6-4, 3-6, 2-6, 7-5.
Lindsay Davenport, of the United States, returns to Alisa Kleybanova, of Russia, at the U.S. Open tennis tournament in New York, Wednesday, Aug. 27, 2008.
Jelena Jankovic of Serbia, falls to the court after a missed point in her match with Sofia Arvidsson of Sweden, at the U.S. Open tennis tournament in New York, Wednesday, Aug. 27, 2008. Jankovic won, 6-3, 6-7 (5), 7-5.
Venus Williams, of the United States, returns to Samantha Stosur of Australia at the U.S. Open tennis tournament in New York on Tuesday, Aug. 26, 2008.
Roger Federer, of Switzerland, returns to Maximo Gonzalez, of Argentina, during a match at the U.S. Open tennis tournament in New York, Tuesday, Aug. 26, 2008.
Serena Williams of the United States reacts to a point during her victory over Kateryna Bondarenko of Ukraine at the U.S. Open tennis tournament in New York, Tuesday, Aug. 26, 2008.
Dinara Safina of Russia returns a shot to Kristie Haerim Ahn of the United States during their match at the U.S. Open tennis tournament in New York, Tuesday, Aug. 26, 2008.
Coco Vandeweghe of the United States reacts after losing a point to No. 2 seed Jelena Jankovic of Serbia during their match at the U.S. Open tennis tournament in New York on Monday, Aug. 25, 2008. Vandeweghe was defeated by Jankovic 6-3, 6-1.
Second-seeded Jelena Jankovic, of Serbia, returns to Coco Vandeweghe, of the United States, at the U.S. Open tennis tournament in New York on Monday, Aug. 25, 2008.
Jeanne Moutoussamy-Ashe, left, and her daughter, Camera, walk into Arthur Ashe Stadium, the facility named for her late husband, Arthur Ashe, during opening ceremonies at the U.S. Open tennis tournament in New York, Monday, Aug. 25, 2008.
Former U.S. Open champions Martina Navratilova, left, Gabriela Sabatini, center, and John McEnroe greet each other during opening ceremonies at the U.S. Open tennis tournament in New York, Monday, August 25, 2008.
Fellow U.S. Open champions Chris Evert, left, Billie Jean King, center, and Stan Smith, right, greet Serena Williams, back to camera, during opening ceremonies at the U.S. Open tennis tournament in New York, Monday, August 25, 2008.
Fireworks explode over Arthur Ashe Stadium during opening ceremonies for the U.S. Open tennis tournament in New York, Monday, Aug. 25, 2008.
Vera Zvonareva, of Russia returns a shot to Barbora Zahlavova Strycova, of the Czech Republic, at the U.S. Open tennis tournament in New York, Monday, Aug. 25, 2008.
Rafael Nadal of Spain keeps his eye on the ball during his match with Bjorn Phau of Germany at the U.S. Open tennis tournament in New York, Monday, Aug. 25, 2008.