Maria Sharapova, of Russia, returns to Serena Williams at the Sony Open tennis tournament in Key Biscayne, Fla., Thursday, March 27, 2014. (AP Photo/Alan Diaz)

Key Biscayne Tennis

Maria Sharapova, of Russia, returns to Serena Williams at the Sony Open tennis tournament in Key Biscayne, Fla., Thursday, March 27, 2014. (AP Photo/Alan Diaz)

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