Kei Nishikori from Japan returns the ball during the Madrid Open tennis tournament men's final match against Rafael Nadal in Madrid, Spain, Sunday, May 11, 2014 . (AP Photo/Daniel Ochoa de Olza)

Spain Madrid Open Tennis

Kei Nishikori from Japan returns the ball during the Madrid Open tennis tournament men's final match against Rafael Nadal in Madrid, Spain, Sunday, May 11, 2014 . (AP Photo/Daniel Ochoa de Olza)

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