Liv Tyler watches the men's championship match between Rafael Nadal, of Spain, and Novak Djokovic, of Serbia.

Jeremy Piven smiles while in attendance at the men's singles final match between Novak Djokovic of Serbia and Rafael Nadal of Spain.

Actress Tea Leoni, right, and her husband David Duchovny watch the men's championship match.

Jeremy Piven and Wilmer Valderrama watch the men's singles final match between Novak Djokovic of Serbia and Rafael Nadal of Spain.

Maria Francisca Perello, Rafael Nadal's girlfriend, watches the men's singles final match between Novak Djokovic of Serbia and Rafael Nadal of Spain on Sept. 13, 2010.

Charlize Theron applauds while watching the men's singles final match between Novak Djokovic of Serbia and Rafael Nadal of Spain.
 

Singer Tony Bennett attends the men's singles semifinal match between Rafael Nadal and Mikhail Youzhny on Saturday, Sept. 11.

Singer Rob Thomas and his wife Marisol Maldonado attend the men's singles semifinal match between Rafael Nadal and Mikhail Youzhny on Saturday, Sept. 11.

Actor Gene Wilder, right, attends the Rafael Nadal-Mikhail Youzhny semifinal match on Saturday, Sept. 11.

Celebrity chef Mario Batali attends the men's singles semifinal match between Rafael Nadal and Mikhail Youzhny on Saturday, Sept. 11.

American fashion designer Tommy Hilfiger attends the men's singles semifinal match between Rafael Nadal and Mikhail Youzhny on Saturday, Sept. 11.

Actor Taye Diggs attends the men's singles semifinal match between Rafael Nadal and Mikhail Youzhny on Saturday, Sept. 11.

"Cheers" and "Frasier" star Kelsey Grammer watches Venus Williams take on Kim Clijsters in their semifinal match Friday, Sept. 10.

Actor Bradley Cooper of "Wedding Crashers" and "The Hangover" takes in Day 12 action at Arthur Ashe Stadium on Friday, Sept. 10.

Kim Kardashian watches a tennis match between Rafael Nadal and Fernando Verdasco both from Spain.

Josh Brolin looks on as Rafael Nadal and Fernando Verdasco of Spain play.

Model Alessandra Ambrosio looks on at the USTA Billie Jean King National Tennis Center.

Actress Charlize Theron attends a tennis match between Rafael Nadal, of Spain, and Fernando Verdasco, also of Spain.

Lance Bass (R) looks on as Rafael Nadal of Spain plays during his men's single quarterfinal match.

Duff Goldman, star of television show Ace of Cakes, plays tennis during day eleven of the 2010 U.S. Open.

Kim Kardashian (L) and Kris Jenner watch the Rafael Nadal match.

NBC News' Matt Lauer watches a tennis match between Rafael Nadal and Fernando Verdasco, both of Spain, at the U.S. Open.

Former tennis player Chris Evert, left, and former model Christie Brinkley watch the men's quarterfinals match between Stanislas Wawrinka and Mikhail Youzhny on Thursday, Sept. 9.

Gavin Rossdale and Anna Wintour look on as Robin Soderling of Sweden plays against Roger Federer of Switzerland.

Television personality Star Jones (C) attends Day 10 of the 2010 U.S. Open.

Clive Davis looks on as Dominika Cibulkova of Slovakia plays against Caroline Wozniacki of Denmark.

Melania Trump looks on as Dominika Cibulkova of Slovakia plays against Caroline Wozniacki of Denmark.

Mary Jo Fernandez looks on as Robin Soderling of Sweden plays against Roger Federer of Switzerland.

Donald Trump looks on as Dominika Cibulkova of Slovakia plays against Caroline Wozniacki of Denmark.

Musician Rob Thomas (L) and wife Marisol Maldonado (R) attend day ten of the 2010 U.S. Open.

French Soccer Player Thierry Henry attends day ten of the 2010 U.S. Open at the USTA Billie Jean King National Tennis Center.

Actor Alec Baldwin (top) and baseball Hall of Famer Hank Aaron (C) attend the women's singles match between Samantha Stosur of Australia and Kim Clijsters of Belgium.

Former baseball players Frank Robinson, left, and Hank Aaron chat during the U.S. Open tennis tournament in New York.

Actor Rick Fox attends the women's singles match between Samantha Stosur of Australia and Kim Clijsters of Belgium.

Singer Gavin Rossdale and singer Gwen Stefani during day eight of the 2010 U.S. Open.

Singer Gwen Stefani is seen during the night match between Roger Federer and Jurgen Melzer.

New York Yankees player Alex Rodriguez, right, watches a match between Roger Federer of Switzerland and Jurgen Melzer of Austria.

Actress Cameron Diaz watches a match between Roger Federer of Switzerland and Jurgen Melzer of Austria.

Television host Ellen Degeneres returns a shot to Melanie Oudin (not pictured) during day eight of the 2010 U.S. Open.

Actress Portia de Rossi looks on during day eight of the 2010 U.S. Open.

Former New York City Mayor David Dinkins attends the 2010 U.S. Open on Sept. 5, 2010.

Actor Ethan Hawke attends the 2010 U.S. Open Sept. 5, 2010.

Actress Minka Kelly and Yankees shortstop Derek Jeter watch as Novak Djokovic of Serbia plays against James Blake of the United States during his men's singles match on day six of the 2010 U.S. Open at the USTA Billie Jean King National Tennis Center on Sept. 4. Later in the day, Jeter went 1-for-4 in the Yankees win over Toronto.

Actor Will Ferrell and wife Viveca Paulin watch the action during day six of the 2010 U.S. Open at the USTA Billie Jean King National Tennis Center on Sept. 4.

Serena Williams watches the match between Mandy Minella of Luxembourg and her sister Venus Williams.

Model Brooklyn Decker attends day three of the 2010 U.S. Open at the USTA Billie Jean King National Tennis Center on September 1, 2010 in the Flushing neighborhood of the Queens borough of New York City.

Musician John Legend (R) and model Christine Teigen attend day three of the 2010 U.S. Open at the USTA Billie Jean King National Tennis Center on September 1, 2010 in the Flushing neighborhood of the Queens borough of New York City.

Singer Usher attends day three of the 2010 U.S. Open at the USTA Billie Jean King National Tennis Center on September 1, 2010 in the Flushing neighborhood of the Queens borough of New York City.

Andy Roddick's wife was on hand, seen here at his opening match Monday, Aug. 30.

The famous actor attending the opening night's slate of matches Monday, Aug. 30.

The tennis legend was honored for overcoming adversity to excel in the sport at the opening ceremony Monday, Aug. 30.

The TV news personality took part in the opening ceremony Monday, Aug. 30.

The mayor of New York City spoke during the opening ceremonies Monday, Aug. 30.

The famed singer Gloria Estefan performed during the opening ceremony Monday, Aug. 30.

The former mayor of New York City and his wife arrive for the opening ceremony Monday, Aug. 30.

The editor-in-chief of Vogue magazine was on hand for the first-night fun Monday, Aug. 30.

Jeanne, the wife of the late Arthur Ashe, and daughter Camera were on hand for the opening night's festivities at the stadium named for Ashe on Monday, Aug. 30.