Kei Nishikori, of Japan, celebrates his 7-6 (7), 2-6, 7-6 (9), win against David Ferrer, of Spain, at the Sony Open Tennis tournament in Key Biscayne, Fla., Tuesday, March 25, 2014. (AP Photo/Alan Diaz)

Key Biscayne Tennis

Kei Nishikori, of Japan, celebrates his 7-6 (7), 2-6, 7-6 (9), win against David Ferrer, of Spain, at the Sony Open Tennis tournament in Key Biscayne, Fla., Tuesday, March 25, 2014. (AP Photo/Alan Diaz)

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