Novak Djokovic, of Serbia, serves to Rafael Nadal, of Spain, during the men's final match at the Sony Open Tennis tournament on Sunday, March 30, 2014, in Key Biscayne, Fla. (AP Photo/Lynne Sladky)

Key Biscayne Tennis

Novak Djokovic, of Serbia, serves to Rafael Nadal, of Spain, during the men's final match at the Sony Open Tennis tournament on Sunday, March 30, 2014, in Key Biscayne, Fla. (AP Photo/Lynne Sladky)

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