Venus Williams

Venus Williams of the U.S. returns the ball to Canada's Aleksandra Wozniak during their London 2012 Olympic Games women's singles second round tennis match at the All England Tennis Club in Wimbledon, on July 31, 2012.

Williams lost her shot at winning an individual Olympic medal at the London Games, losing a third-round match to Angelique Kerber of Germany, but she still has a chance with sister Serena in doubles.

Venus Williams of the United States returns a shot to Aleksandra Wozniak of Canada during the second round of women's singles tennis of the London 2012 Olympic Games at Wimbledon on July 31, 2012.

Williams has three Olympic medals,winning both singles and doubles in 2000 in Sydney and doubles in 2008 in Beijing.

Sisters Venus Williams, left and Serena Williams wave to fans during a training session at Wimbledon on July 26, 2012, in London, one day before the start of the London 2012 Olympic Games.

Andy Murray of Great Britain hands the Olympic Flame over to Venus Williams of United States at the All England Lawn Tennis and Croquet Club in Wimbledon on July 23, 2012. The Olympic flame was on a 70-day relay through the U.K. before the London 2012 Olympics opening ceremony on July 27, 2012.

Venus Williams looks on during her ladies' doubles third-round match alongside sister Serena Williams against Maria Kirilenko and Nadia Petrova of Russia during the Wimbledon Lawn Tennis Championships on July 4, 2012, in London. The Williams sisters won the title.

Venus Williams waves to fans after being defeated by Elena Vesnina — AP Photo/Alastair Grant

Venus Williams of the United States waves to fans after being defeated by Elena Vesnina of Russia during a first round women's singles match at Wimbledon on June 25, 2012.

MELBOURNE, AUSTRALIA - JANUARY 17: Venus Williams of the United States of America plays a backhand in her first round match against Sara Errani of Italy during day one of the 2011 Australian Open at Melbourne Park on January 17, 2011 in Melbourne, Austral — Getty

Venus Williams plays a backhand in her first-round match against Sara Errani of Italy during day one of the 2011 Australian Open at Melbourne Park on Jan. 17, 2011.

Venus Williams hits a return directly before doubling over hurt against Andrea Petkovic of Germany during their round three women's singles match of the Australian Open tennis tournament in Melbourne on Jan. 21, 2011.

Venus Williams returns a shot to Francesca Schiavone, of Italy, during a quarterfinal at the U.S. Open tennis tournament in New York, Sept. 7, 2010.

Venus Williams of the United States returns a shot against Shahar Peer of Israel during her women's singles match on day seven of the 2010 U.S. Open.

Venus Williams of the United States makes a backhand return to Paraguay's Rossana De Los Rios at the All England Lawn Tennis Championships at Wimbledon, June 21, 2010.

Venus Williams, right, and Serena Williams hold the cup after defeating Czech Republic's Kveta Peschke and Slovenia's Katarina Srebotnik during a women's doubles final for the French Open tennis tournament at Roland Garros stadium in Paris, June 4, 2010.

Venus Williams waves at the French Open tennis tournament at the Roland Garros stadium in Paris, May 26, 2010. Her black and red corset-like outfit drew wolf whistles and lots of comments.

The tennis star is known as much for her provocative outfits as she is for her career highlights. An entrepreneur and design-school graduate, she is CEO of her own design firm.

Pictures: Her provocative tennis outfits

Venus Williams of the United States serves to Agnieszka Radwanska of Poland, during the Sony Ericsson Open tennis tournament in Key Biscayne, Fla., March 30, 2010.

Venus Williams, of the United States, returns the ball to Svetlana Kuznetsova, of Russia, during a semifinal of the Billie Jean King Cup tennis exhibition, March 1, 2010, at Madison Square Garden in New York.

From left, Victoria Azarenka of Belarus, Venus Williams of the U.S. and Gisela Dulko of Argentina hold Hong Kong dollar notes during an promotional event in Hong Kong on Jan. 5, 2010. They were there for the Hong Kong Tennis Classic 2010 from Jan 6 to 9.

Venus Williams of the United States returns to Jelena Jankovic of Serbia during their singles match at the WTA Tennis Championships, in Doha, Qatar, Oct. 31, 2009.

Venus Williams of U.S. returns to Dinara Safina of Russia, during their women's singles semifinal on the Centre Court at Wimbledon, July 2, 2009.