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BARCELONA, SPAIN - APRIL 20: Kei Nishikori plays a forehand against Thiemo De Bakker during day three of the Barcelona Open Banc Sabadell at the Real Club de Tenis Barcelona on April 20, 2016 in Barcelona, Spain. (Photo by Alex Caparros/Getty Images)

BARCELONA, SPAIN - APRIL 20:  Kei Nishikori plays a forehand against Thiemo De Bakker during day three of the Barcelona Open Banc Sabadell at the Real Club de Tenis Barcelona on April 20, 2016 in Barcelona, Spain.  (Photo by Alex Caparros/Getty Images)