Sony

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Maria Sharapova, of Russia, returns the ball to Kurumi Nara, of Japan, during a match at the Sony Open tennis tournament, Thursday, March 20, 2014, in Key Biscayne, Fla. (AP Photo/Luis M. Alvarez)

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Yaroslava Shvedova, of Kazakhstan, celebrates after scoring a point against Serena Williams at the Sony Open tennis tournament in Key Biscayne, Fla., Thursday, March 20, 2014. (AP Photo/Alan Diaz)

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Serena Williams returns to Yaroslava Shvedova, of Kazakhstan, at the Sony Open tennis tournament in Key Biscayne, Fla., Thursday, March 20, 2014. (AP Photo/Alan Diaz)