David Ferrer, of Spain, returns to Kei Nishikori, of Japan, at the Sony Open Tennis tournament in Key Biscayne, Fla., Tuesday, March 25, 2014. (AP Photo/Alan Diaz)

Key Biscayne Tennis

David Ferrer, of Spain, returns to Kei Nishikori, of Japan, at the Sony Open Tennis tournament in Key Biscayne, Fla., Tuesday, March 25, 2014. (AP Photo/Alan Diaz)

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