Venus Williams, of the US, waves to the crowd after defeating Zheng Saisai, of China, during the first round of the US Open tennis tournament in New York.
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Venus Williams, of the United States, returns the ball to Bethanie Mattek-Sands, of the United States, during the Mubadala Silicon Valley Classic tennis tournament in San Jose, Cal...
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Venus Williams returns a shot during an exhibition tennis match against Madison Keys in Atlanta.
AP Photo/John Bazemore
Venus Williams of the US returns a shot to Belarus' Aliaksandra Sasnovich, during day five of the Birmingham Classics, at Edgbaston Priory Club, in Birmingham, England.
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Venus Williams of the United States returns the ball to Johanna Konta of Britain at the Italian Open tennis tournament, in Rome.
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Venus Williams from the U.S. reacts after beating her sister Serena, in a match during the opening day of the Mubadala World Tennis Championship in Abu Dhabi, United Arab Emirates....
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Venus Williams, left, from the U.S. celebrates after beating her sister, Serena, in a match at the opening day of the Mubadala World Tennis Championship in Abu Dhabi, United Arab E...
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Serena Williams, left, meets her sister Venus Williams after their match during the third round of the U.S. Open tennis tournament, in New York. Serena Williams won 6-1, 6-2.
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Venus Williams serves to Camila Giorgi, of Italy, during the second round of the U.S. Open tennis tournament, in New York.
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Venus Williams, right, of the United States, shakes hands with Maria Sakkari, of Greece, after Sakkari won their match at the Mubadala Silicon Valley Classic tennis tournament in S...
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Venus Williams, of the United States, celebrates a point against Heather Watson, from Britain, during the Mubadala Silicon Valley Classic tennis tournament in San Jose, California....
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Venus Williams of the US returns a ball to Alexandra Dulgheru of Romania during their women's singles match on the third day at the Wimbledon Tennis Championships in London.
AP Photo/Ben Curtis
Venus Williams of the US celebrates defeating Johanna Larsson of Sweden during the Women's Singles first round match at the Wimbledon Tennis Championships in London.
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Venus, right, and Serena Williams of the U.S. talks tactics in their first round match against Japan's Shuko Aoyama and Miyu Kato at the French Open tennis tournament at the Roland...
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Venus Williams reacts after defeating Johanna Konta of Germany 5-7, 6-1, 6-2 during the Miami Open tennis tournament.
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Venus Williams, returns to Kiki Bertens, of the Netherlands, during the Miami Open tennis tournament
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Venus Williams chases down a shot from opponent and sister Serena Williams during the third round of the BNP Paribas Open tennis tournament at the Indian Wells Tennis Garden in Ind...
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USA's Venus Williams, left, and Serena Williams , right, talk between points in their doubles match against Netherlands' Leslie Herkhove and Demi Schuurs in the first round of Fed ...
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Venus Williams of the U.S. plays a forehand to Germany's Angelique Kerber in their women's singles match at the Sydney International tennis tournament in Sydney.
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Venus Williams of the United States makes a forehand return to Caroline Garcia of France during their semifinal match at the WTA tennis tournament in Singapore.