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BARCELONA, SPAIN - APRIL 23: Kei Nishikori of Japan plays a forehand against Benoit Paire of France during day six of the Barcelona Open Banc Sabadell at the Real Club de Tenis Barcelona on April 23, 2016 in Barcelona, Spain. (Photo by David Ramos/Getty Images)

BARCELONA, SPAIN - APRIL 23:  Kei Nishikori of Japan plays a forehand against Benoit Paire of France during day six of the Barcelona Open Banc Sabadell at the Real Club de Tenis Barcelona on April 23, 2016 in Barcelona, Spain.  (Photo by David Ramos/Getty Images)