Stefan 'Redfoo' Gordy of the American electro duo LMFAO takes his seat for the start of the women's singles final match between Serena Williams of the United States and Victoria Azarenka of Belarus at the 2012 US Open, Sep. 9, 2012, New York City.
Sloane Stephens of the U.S. serves to compatriot Serena Williams during their women's singles quarter-final match at the Australian Open tennis tournament in Melbourne, January 23, 2013. REUTERS/Tim Wimborne (AUSTRALIA - Tags: SPORT TENNIS TPX IMAGES OF THE DAY)
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Serena Williams of the United States returns a shot against Andrea Hlavackova of Czech Republic during their women's singles fourth round match on Day Eight of the 2012 US Open at USTA Billie Jean King National Tennis Center on Sept. 3, 2012, in New York City.
John G. Mabanglo / EPA
Victor R. Caivano / AP
United States' Serena Williams celebrates after defeating Maria Sharapova of Russia to win the women's singles gold medal match at the All England Lawn Tennis Club at Wimbledon, in London, at the 2012 Summer Olympics, on Aug. 4, 2012.
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Maria Sharapova of Russia looks on against Serena Williams of the United States during the gold medal match of the Women's Singles Tennis on Day 8 of the London 2012 Olympic Games at the All England Lawn Tennis and Croquet Club on August 4, 2012 in London, England.
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Serena Williams photographed at her home court at BallenIsles in Palm Beach Gardens, Florida.
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Sloane Stephens of the U.S. serves to compatriot Serena Williams during their women's singles quarter-final match at the Australian Open tennis tournament in Melbourne, Jan. 23, 2013.
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Sloane Stephens watches herself become a social media sensation after she beat Serena Williams at the Australian Open, in Melbourne, Australia, on January 23