Sergiy Stakhovsky, of Ukraine, returns the ball to Sam Querrey during the Sony Open tennis tournament, Thursday, March 20, 2014, in Key Biscayne, Fla. (AP Photo/Luis M. Alvarez)

Sony Open Tennis

Sergiy Stakhovsky, of Ukraine, returns the ball to Sam Querrey during the Sony Open tennis tournament, Thursday, March 20, 2014, in Key Biscayne, Fla. (AP Photo/Luis M. Alvarez)

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