Alexandr Dolgopolov, of Ukraine, returns the ball toJarkko Nieminen, of Finland, during the Sony Open tennis tournament, Saturday, March 22, 2014, in Key Biscayne, Fla. (AP Photo/Luis M. Alvarez)

Sony Open Tennis

Alexandr Dolgopolov, of Ukraine, returns the ball toJarkko Nieminen, of Finland, during the Sony Open tennis tournament, Saturday, March 22, 2014, in Key Biscayne, Fla. (AP Photo/Luis M. Alvarez)

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