Champion Esther Vergeer of Netherlands and runner up Daniela Di Toro of Australia pose with their awards after the conclusion of their women's wheelchair singles final.

Jack Sock of the United States reacts while playing against Denis Kudla of the United States during his junior boys' singles final match.

Denis Kudla of the United States serves against Jack Sock of the United States during his junior boys' singles final match.

Liezel Huber of the United States (L) and Nadia Petrova of Russia play against Vania King of the United States and Yaroslava Shvedova of Kazakhstan during their women's doubles final match.

Yulia Putintseva of Russia returns a shot against Daria Gavrilova of Russia during her junior girls' singles final match. Putintseva lost the match 6-3, 6-2.

Daria Gavrilova of Russia returns a shot against Yulia Putintseva of Russia during her junior girls' singles final match. Gavrilova defeated Putintseva 6-3, 6-2.

Kim Clijsters celebrates after beating Venus Williams 4-6, 7-6 (2), 6-4 on Friday, Sept. 10 to reach the U.S. Open final for what amounts to the third straight time. She's won each of the last two times she's played the event, in 2005 and 2009.

After cruising through her first five matches, Venus Williams hit the wall in a three-set loss to Kim Clijsters in their semifinal match Friday, Sept. 10.

Kim Clijsters returns the ball to Venus Williams during their semifinal match Friday, Sept. 10. Clijsters beat Venus at the U.S. Open for the second straight year.

Vera Zvonareva followed up her appearance in this year's Wimbledon final by making it to the U.S. Open final with a win over top seed Caroline Wozniacki in the semifinals Friday, Sept. 10.

Vera Zvonareva, left, shakes hands with Caroline Wozniacki after their semifinal match Friday, Sept. 10.

Caroline Wozniacki was plenty frustrated during her 6-4, 6-3 loss to Vera Zvonareva in the semifinals Friday, Sept. 10.

Rohan Bopanna of India, right, shakes hands with Mike Bryan, second from left, of the United States after Bryan and his brother Bob Bryan, left, beat Bopanna and partner Aisam-Ul-Haq Qureshi of Pakistan in the men's doubles final Friday, Sept. 10.

Anna Kournikova plays against Pat Cash and Mats Wilander during day eleven of the 2010 U.S. Open in an exhibition match.

Former tour pros Martina Hingis, left , of Switzerland, and Anna Kournikova, of Russia, react during an exhibition match against Mats Wilander, of Sweden, and Pat Cash, of Australia, at the U.S. Open.

Rafael Nadal, of Spain, reacts after defeating Fernando Verdasco, also of Spain, 7-5, 6-3, 6-4 in a quarterfinal match at the U.S. Open.

Rafael Nadal, of Spain, returns a shot Fernando Verdasco, also of Spain, in a quarterfinal match.

Fernando Verdasco, of Spain, readies for a return to countryman Rafael Nadal during a quarterfinal at the U.S. Open tennis tournament in New York, Thursday, Sept. 9, 2010. (

Rafael Nadal of Spain reacts after a point against Fernando Verdasco of Spain during his men's single quarterfinal match.

Rafael Nadal of Spain celebrates after defeating against Fernando Verdasco of Spain during his men's single quarterfinal match on day eleven of the 2010 U.S. Open.

Mikhail Youzhny returns a shot to Stanislas Wawrinka during their quarterfinal match Thursday, Sept. 9. Youzhny won in five sets to reach his second U.S. Open semifinal.

Stanislas Wawrinka throws down his racket in disgust during his quarterfinal against Mikhail Youzhny on Thursday, Sept. 9. Wawrinka lost in five sets.

Danish tennis player Caroline Wozniacki argues a call with chair umpire during her match against Slovak tennis player Dominika Cibulkova, during their quarterfinal match.

Dominika Cibulkova, of Slovakia, returns a shot to Caroline Wozniacki, of Denmark, in a quarterfinal.

Caroline Wozniacki, of Denmark, returns a shot to Dominika Cibulkova, of Slovakia, during a quarterfinal at the U.S. Open. Wozniacki won 6-2, 7-5.

Caroline Wozniacki of Denmark celebrates after defeating Dominika Cibulkova of Slovakia during her women's single quarterfinal match.

Novak Djokovic of Serbia hits a return against Gael Monfils of France. Djokovic advanced to his fourth straight U.S. Open semifinal.

Gael Monfils of France hits a return against Novak Djokovic of Serbia during his men's singles quarterfinal match.

Kaia Kanepi shows her frustration during her quarterfinal match against Vera Zvonareva on Wednesday, Sept. 8. Kanepi lost in straight sets.

Vera Zvonareva returns the ball to Kaia Kanepi during their quaterfinal match Wednesday, Sept. 8. Zvonareva won in straight sets.

Rafael Nadal serves to Feliciano Lopez during their fourth-round match Tuesday, Sept. 7. Nadal has yet to drop a set — or his serve — in the tournament.

Feliciano Lopez reacts during his fourth-round match against fellow Spaniard Rafael Nadal on Tuesday, Sept. 7. The top-ranked Nadal won in straight sets.

Kim Clijsters, of Belgium, celebrates after defeating Samantha Stosur, of Australia, 6-4, 5-7, 6-3 in the quarterfinals.

Fernando Verdasco, of Spain, reacts after defeating David Ferrer, of Spain, 5-7, 6-7 (8), 6-3, 6-3, 7-6 (4) in a fourth-round match.

Samantha Stosur, of Australia, returns a shot to Kim Clijsters, of Belgium, during her quarterfinal match .

David Ferrer, of Spain, returns a shot to Fernando Verdasco, of Spain, at the U.S. Open.

Fernando Verdasco, of Spain, returns the ball to David Ferrer, of Spain.

Venus Williams, of the United States defeats Francesca Schiavone, of Italy, 7-6 (5), 6-4 in the quarterfinals.

Francesca Schiavone, of Italy, serves to Venus Williams, of the United States, during the quarterfinals of the U.S. Open.

Stanislas Wawrinka celebrates after defeating Sam Querrey in their fourth-round match Tuesday, Sept. 7. Wawrinka won 7-6 (9), 6-7 (5), 7-5, 4-6, 6-4.

Sam Querrey reacts after losing a point against Stanislas Wawrinka during their fourth-round match Tuesday, Sept. 7. Querrey lost in five sets, leaving the men's draw void of Americans.

Mikhail Youzhny celebrates after a point against Tommy Robredo during their fourth-round match Tuesday, Sept. 7. Youzhny won in four sets to reach the quarterfinals.

Tommy Robredo tosses his racket after a shot against Mikhail Youzhny during their fourth-round match Tuesday, Sept. 7. Youzhny won in four sets.

Jurgn Melzer, of Austria, serves to Roger Federer, of Switzerland.

Roger Federer, of Switzerland, raises his arms after beating Jurgen Melzer, of Austria.

With his back to the net, Roger Federer returns a shot over his head against Jurgen Melzer.

Jurgen Melzer reacts against Roger Federer in the fourth round of the U.S. Open.

Roger Federer of hits a return against Jurgen Melzer.

Vera Zvonareva of Russia hits a return against Andrea Petkovic of Germany.

Andrea Petkovic of Germany reacts against Vera Zvonareva of Russia.

Robin Soderling of Sweden returns a shot against Albert Montanes of Spain.

Caroline Wozniacki of Denmark signs autographs after defeating Maria Sharapova of Russia 6-3, 6-4.

Caroline Wozniacki of Denmark celebrates match point against Maria Sharapova of Russia. Wozniacki defeated Sharapova 6-3, 6-4.

Maria Sharapova of Russia returns a shot against Caroline Wozniacki of Denmark. Wozniacki won the match 6-3, 6-4.

Caroline Wozniacki of Denmark stumbles and falls to the court as she tries to return a shot by Maria Sharapova of Russia in the fourth round Monday at the U.S. Open.

Kaia Kanepi of Estonia returns the ball to Yanina Wickmayer of Belgium. Kanepi won the fourth-round match, 0-6, 7-6 (2), 6-1.

Maria Sharapova of Russia returns the ball to Caroline Wozniacki of Denmark.

Caroline Wozniacki of Denmark stretches to return the ball to Maria Sharapova of Russia.

Novak Djokovic of Serbia celebrates after beating Mardy Fish of the United States, 6-3, 6-4, 6-1, in the fourth round.

Yanina Wickmayer of Belgium celebrates after a point against Kaia Kanepi of Estonia.

Gael Monfils of France reaches for a return but can't make the shot against Richard Gasquet of France.

Svetlana Kuznetsova of Russia rests against the wall as she plays Dominika Cibulkova of Slovakia in the fourth round. Cibulkova won the match, 7-5, 7-6 (4).

Dominika Cibulkova of Slovakia celebrates after beating Svetlana Kuznetsova of Russia.

French tennis players Richard Gasquet (left) and Gael Monfils pose before their match. Monfils won, 6-4, 7-5, 7-5.

Elena Dementiava, of Russia, returns to Samantha Stosur, of Australia.

Samantha Stosur of Australia hits a return against Elena Dementieva of Russia during her women's singles match.

Gilles Simon of France returns a shot against Rafael Nadal of Spain on Sunday at the U.S. Open.

Rafael Nadal of Spain celebrates after defeating Gilles Simon of France in straight sets.

Tommy Robredo of Spain celebrates after a point against Michael Llodra of France.

Sergiy Stakhovsky of Ukraine (left) shakes hands with Feliciano Lopez of Spain after Stakhovsky retired from their match. Stakhovsky could not continue playing because of a right toe infection.

Andy Murray of Great Britain returns a shot against Stanislas Wawrinka of Switzerland. Murray lost in four sets.

Shahar Peer of Israel serves against Venus Williams of the United States during her women's singles match on Sept. 5.

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Stanislas Wawrinka of Switzerland reacts against Andy Murray of Great Britain. Wawrinka upset the No. 4 seed.

Venus Williams of the United States returns a shot against Shahar Peer of Israel during her women's singles match on Sept. 5.

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Nicolas Almagro of Spain serves to Sam Querrey of the United States at the U.S. Open tennis tournament in New York, Sunday, Sept. 5.

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Sam Querrey of the United States reacts against Nicolas Almagro of Spain during his men's singles match on Sept. 5.

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David Ferrer of Spain returns a shot against Daniel Gimeno-Traver of Spain during his men's singles match on Sept. 5.

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Anastasia Pavlyuchenkova of Russia returns a shot against Francesca Schiavone of Italy during her women's singles match on Sept. 5.

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Francesca Schiavone of Italy serves against Anastasia Pavlyuchenkova of Russia during her women's singles match on Sept. 5.

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Fernando Verdasco of Spain returns the ball to David Nalbandian of Argentina at the U.S. Open tennis tournament in New York, Sunday, Sept. 5.

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Kim Clijsters of Belgium returns a shot against Ana Ivanovic of Serbia during her women's singles match on Sept. 5.

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Ana Ivanovic of Serbia returns a shot against Kim Clijsters of Belgium during her women's singles match on Sept. 5.

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