Novak Djokovic, of Serbia, holds the winner's trophy after winning the Sony Open Tennis in Key Biscayne, Fla., Sunday, March 30, 2014, defeating Rafeal Nadal, of Spain, 6-3, 6-3. (AP Photo/J Pat Carter)

Key Biscayne Tennis

Novak Djokovic, of Serbia, holds the winner's trophy after winning the Sony Open Tennis in Key Biscayne, Fla., Sunday, March 30, 2014, defeating Rafeal Nadal, of Spain, 6-3, 6-3. (AP Photo/J Pat Carter)

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