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BARCELONA, SPAIN - APRIL 24: Kei Nishikori of Japan celebrates a point against Rafael Nadal of Spain during day seven of the Barcelona Open Banc Sabadell at the Real Club de Tenis Barcelona on April 24, 2016 in Barcelona, Spain. (Photo by Manuel Queimadelos Alonso/Getty Images)

BARCELONA, SPAIN - APRIL 24: Kei Nishikori of Japan celebrates a point against Rafael Nadal of Spain during day seven of the Barcelona Open Banc Sabadell at the Real Club de Tenis Barcelona on April 24, 2016 in Barcelona, Spain. (Photo by Manuel Queimadelos Alonso/Getty Images)