Maria Sharapova, of Russia, returns to Petra Kvitova, of the Czech Republic, at the Sony Open Tennis tournament, Tuesday, March 25, 2014, in Key Biscayne, Fla. Sharapova defeated Kvitoka 7-5, 6-1. (AP Photo/Lynne Sladky)

Key Biscayne Tennis

Maria Sharapova, of Russia, returns to Petra Kvitova, of the Czech Republic, at the Sony Open Tennis tournament, Tuesday, March 25, 2014, in Key Biscayne, Fla. Sharapova defeated Kvitoka 7-5, 6-1. (AP Photo/Lynne Sladky)

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