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BARCELONA, SPAIN - APRIL 23: Kei Nishikori of Japan plays a backhand against Taylor Fritz of the United States in their round of 32 match during day two of the Barcelona Open Banc Sabadellat Real Club De Tenis Barcelona on April 23, 2019 in Barcelona, Spain. (Photo by David Ramos/Getty Images)

BARCELONA, SPAIN - APRIL 23: Kei Nishikori of Japan plays a backhand against Taylor Fritz of the United States in their round of 32 match during day two of the Barcelona Open Banc Sabadellat Real Club De Tenis Barcelona on April 23, 2019 in Barcelona, Spain. (Photo by David Ramos/Getty Images)