Kei Nishikori from Japan returns the ball during a Madrid Open tennis tournament final match against Rafael Nadal from Spain in Madrid, Spain, Sunday, May 11, 2014. (AP Photo/Andres Kudacki)
Rafael Nadal from Spain poses for photographers with his trophy, after winning his Madrid Open tennis tournament, men's final match against Kei Nishikori from Japan in Madrid, Spain, Sunday, May 11, 2014. (AP Photo/Andres Kudacki)
Kei Nishikori from Japan reacts 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)
Rafael Nadal from Spain celebrates a point during a Madrid Open tennis tournament final match against Kei Nishikori from Japan in Madrid, Spain, Sunday, May 11, 2014. (AP Photo/Andres Kudacki)