2010 U.S. Open

Novak Djokovic, left, of Serbia, walks away from Rafael Nadal, of Spain, after Nadal was presented with the championship trophy after winning the men's championship match at the U.S. Open tennis tournament in New York, Monday, Sept. 13, 2010.

Rafael Nadal, of Spain, reacts after defeating Novak Djokovic, of Serbia, to win the men's championship match at the U.S. Open tennis tournament in New York, Monday, Sept. 13, 2010.

Novak Djokovic of Serbia reacts after losing a point to Rafael Nadal of Spain during the men's championship match at the U.S. Open tennis tournament in New York, Monday, Sept. 13, 2010.

Rafael Nadal, of Spain, reacts during the men's championship match against Novak Djokovic, of Serbia, at the U.S. Open tennis tournament in New York, Monday, Sept. 13, 2010.

Kim Clijsters, of Belgium, kisses the championship trophy after winning the finals at the U.S. Open tennis tournament in New York, Saturday, Sept. 11, 2010.

Vera Zvonareva, of Russia, reacts following the women's championship match against Kim Clijsters, of Belgium, at the U.S. Open tennis tournament in New York, Saturday, Sept. 11, 2010. Clijsters won in two sets.

Kim Clijsters, of Belgium, returns the ball to Vera Zvonareva, of Russia, during the women's championship match at the U.S. Open tennis tournament in New York, Saturday, Sept. 11, 2010.

Novak Djokovic, of Serbia, reacts during a men's semifinal match against Roger Federer, of Switzerland, at the U.S. Open tennis tournament in New York, Saturday, Sept. 11, 2010.

Roger Federer, of Switzerland, reacts after breaking the serve of Novak Djokovic, of Serbia, and winning the third set of a men's semifinal match at the U.S. Open tennis tournament in New York, Saturday, Sept. 11, 2010.

Novak Djokovic, of Serbia, returns the ball to Roger Federer, of Switzerland, during a men's semifinal match at the U.S. Open tennis tournament in New York, Saturday, Sept. 11, 2010.

Rafael Nadal, of Spain, returns a shot to Mikhail Youzhny, of Russia, during a men's semifinal match at the U.S. Open tennis tournament in New York, Saturday, Sept. 11, 2010.

Mikhail Youzhny, of Russia, returns the ball to Stanislas Wawrinka, of Switzerland, in a quarterfinal at the U.S. Open tennis tournament in New York, Thursday, Sept. 9, 2010. Youzhny won 3-6, 7-6 (7), 3-6, 6-3, 6-3.

Rafael Nadal of Spain, returns a shot to Fernando Verdasco, of Spain, in the quarterfinals of the U.S. Open tennis tournament in New York, Thursday, Sept. 9, 2010.

Caroline Wozniacki, of Denmark, returns a shot to Dominika Cibulkova, of Slovakia, during a quarterfinal at the U.S. Open tennis tournament in New York, Wednesday, Sept. 8, 2010. Wozniacki won 6-2, 7-5.

Swiss tennis player Roger Federer returns a point against Swedish tennis player Robin Soderling, during their quarterfinals match at the 2010 US Open tennis tournament September 8, 2010, in New York. Federer won 6-4, 6-4, 7-5.

Robin Soderling, of Sweden, returns a shot to Roger Federer, of Switzerland, during a quarterfinal at the U.S. Open tennis tournament in New York, Wednesday, Sept. 8, 2010.

Vera Zvonareva of Russia returns the ball to Kaia Kanepi of Estonia during their quaterfinals match at the U.S. Open tennis tournament in New York, Wednesday, Sept. 8, 2010. Zvonareva won 6-3, 7-5.

Novak Djokovic of Serbia celebrates after beating Gael Monfils of France 7-6(2), 6-1, 6-2 in quarterfinal play during the U.S. Open tennis tournament in New York, Wednesday, Sept. 8, 2010.

Rafael Nadal, of Spain, returns a shot to his countryman Feliciano Lopez during a fourth-round match at the U.S. Open in New York, Sept. 7, 2010. Nadal beat Lopez 6-3, 6-4, 6-4

Venus Williams returns a shot to Francesca Schiavone, of Italy, during a quarterfinal at the U.S. Open, Sept. 7, 2010. The No. 3-seeded Williams overcame nine double-faults and a total of 33 unforced errors to beat reigning French Open champion Schiavone 7-6 (5), 6-4 in the quarterfinals.

Francesca Schiavone reacts during a quarterfinal against Venus Williams at the U.S. Open, Sept. 7, 2010.

A wide view of Venus Williams playing against Francesca Schiavone of Italy during day nine of the 2010 U.S. Open at the USTA Billie Jean King National Tennis Center in New York, Sept. 7, 2010.

Kim Clijsters, left, of Belgium, is congratulated by Samantha Stosur, of Australia, after Clisters won 6-4, 5-7, 6-3 in a quarterfinal match at the U.S. Open, Sept. 7, 2010.

Fernando Verdasco of Spain celebrates after he won his men's singles match against David Ferrer of Spain on day nine of the U.S. Open, Sept. 7, 2010.

Caroline Wozniacki of Denmark celebrates after beating Maria Sharapova of Russia 6-3, 6-4 in the fourth round of play at the U.S. Open tennis tournament in New York, Sept. 6, 2010.

Caroline Wozniacki of Denmark stumbles as she tries to return a shot by Maria Sharapova in the fourth round of play at the U.S. Open in New York, Sept. 6, 2010. Wozniacki was not injured.

Dominika Cibulkova of Slovakia celebrates after beating Svetlana Kuznetsova of Russia 7-5, 7-6(4) in the fourth round of play at the U.S. Open in New York, Sept. 6, 2010.

Andy Murray of Britain chases down the ball to return a shot to Stanislas Wawrinka of Switzerland at the U.S. Open in New York, Sept. 5, 2010.

Fuzz flies off the tennis ball as Rafael Nadal of Spain returns a shot to Gilles Simon of France at the U.S. Open in New York, Sept. 5, 2010. Nadal won the match 6-4, 6-4, 6-2.

Kim Clijsters of Belgium returns the ball to Ana Ivanovic of Serbia at the U.S. Open tennis tournament, Sept. 5, 2010.

Francesca Schiavone of Italy laughs after a shot against Anastasia Pavlyuchenkova of Russia at the U.S. Open in New York, Sept. 5, 2010.

Venus Williams returns the ball to Shahar Peer of Israel at the U.S. Open, Sept. 5, 2010.

As fans leap to their feet, Denis Istomin, of Uzbekistan, reacts after returning a dramatic shot at the net to Rafael Nadal during a tie-breaker in the second set at the U.S. Open, Sept. 3, 2010. Istomin won the point but lost the second set.

Rafael Nadal, of Spain, serves to Denis Istomin, of Uzbekistan, at the U.S. Open tennis tournament in New York, Friday, Sept. 3, 2010. (AP Photo/Charles Krupa)

Rafael Nadal serves to Denis Istomin, of Uzbekistan, at the U.S. Open in New York, Sept. 3, 2010.

A colorful sky glows over the Arthur Ashe Stadium as Venus Williams warms up prior to facing Mandy Minella, of Luxembourg, at the U.S. Open, Sept. 3, 2010.

Dustin Brown of Jamaica returns the ball to Andy Murray of Britain at the U.S. Open in New York, Sept. 3, 2010.

Elena Dementieva of Russia gets ready to serve to Daniela Hantuchova of Slovakia at the U.S. Open tennis tournament in New York, Friday, Sept. 3, 2010.

Vera Zvonareva of Russia returns the ball to Sabine Lisicki of Germany at the U.S. Open tennis tournament in New York, Thursday, Sept. 2, 2010. Zvonareva won the match 6-1, 7-6(5).

Patty Schnyder of Switzerland cools off with an ice bag and a drink between sets as she plays Maria Jose Martinez Sanchez at the U.S. Open tennis tournament in New York, Thursday, Sept. 2, 2010.

Maria Sharapova, of Russia, blows a kiss to the crowd after beating Iveta Benesova, of the Czech Republic, 6-1, 6-2, at the U.S. Open tennis tournament in New York, Thursday, Sept. 2, 2010.

Kim Clijsters of Belgium launches a ball into the stands after defeating Sally Peers of Australia, 6-2, 6-1, at the U.S. Open tennis tournament in New York, Wednesday, Sept. 1, 2010.

Janko Tipsarevic, left, of Serbia, pumps his fist after beating Andy Roddick of the United States 3-6, 7-5, 6-3, 7-6 (4), at the U.S. Open tennis tournament in New York, Wednesday, Sept. 1, 2010.

A medical worker helps Victoria Azarenka of Belarus after Azarenka collapsed on the court while playing Gisela Dulko of Argentina, at the U.S. Open tennis tournament in New York, Wednesday, Sept. 1, 2010. Azarenka was taken off the court in a wheelchair.

Venus Williams of the United States returns the ball to Rebecca Marino of Canada at the U.S. Open tennis tournament in New York, Wednesday, Sept. 1, 2010.

Rafael Nadal of Spain celebrates after breaking the serve of Teymuraz Gabashvili of Russia in the third set during a U.S. Open tennis tournament first-round match in New York, Tuesday, Aug. 31, 2010. Top-seeded Nadal found himself in a surprisingly competitive match but still won in straight sets, getting past 93rd-ranked Gabashvili 7-6 (4), 7-6 (4), 6-3 at night. There were only two breaks of serve - both by Nadal; the last two times Gabashvili served under the lights.

Jelena Jankovic of Serbia returns the ball to Simona Halep of Romania during the first round of the U.S. Open tennis tournament in New York, Tuesday, Aug. 31, 2010. Jankovic won the match, 6-4, 4-6, 7-5.

Arnaud Clement of France holds an ice bag to his face between sets against Marcos Baghdatis of Cyprus in the first round of the U.S. Open tennis tournament in New York, Tuesday, Aug. 31, 2010. Clement upset 16th-seeded Baghdatis, 6-3, 2-6, 1-6, 6-4, 7-5.

Marcos Baghdatis of Cyprus holds towels filled with ice around his neck between sets in his first round match with Arnaud Clement of France at the U.S. Open tennis tournament in New York, Tuesday, Aug. 31, 2010. Clement upset 16th-seeded Baghdatis, 6-3, 2-6, 1-6, 6-4, 7-5.

Simona Halep, right, of Romania shows her displeasure with a shot as she plays Jelena Jankovic of Serbia during the first round of the U.S. Open tennis tournament in New York, Tuesday, Aug. 31, 2010. No. 4-seeded Jankovic managed to get past 18-year-old Halep, 4-6, 6-4, 7-5.

Kimiko Date Krumm of Japan wipes her face as she plays Svetlana Kuznetsova of Russia during the first round of the U.S. Open tennis tournament in New York, Tuesday, Aug. 31, 2010. Kuznetsova, the 2004 U.S. Open champion, needed three sets before eliminating Krumm.

Roger Federer celebrates after he struck a shot between his legs for a winner against Brian Dabul of Argentina during the first round at the U.S. Open tennis tournament in New York, Monday, Aug. 30, 2010. Federer won, 6-1, 6-4, 6-2.

Melanie Oudin of the United States returns a shot against Olga Savchuk of Ukraine during the U.S. Open tennis tournament in New York, Monday, Aug. 30, 2010. Oudin won 6-3, 6-0.

Francesca Schiavone of Italy returns a shot to Ayumi Morita of Japan during the first round of the U.S. Open tennis tournament in New York, Monday, Aug. 30, 2010.

Melanie Oudin of the United States returns a shot against Olga Savchuk of Ukraine during the U.S. Open tennis tournament in New York, Monday, Aug. 30, 2010. Oudin won, 6-3, 6-0.

Illya Marchenko of Ukraine returns a shot to Marin Cilic of Croatia during the first round of the U.S. Open tennis tournament in New York, Monday, Aug. 30, 2010.