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BARCELONA, SPAIN - APRIL 25: Kei Nishikori of Japan returns a shot during his Men's round of 16 match against Félix AugerAliassime of Canada on day four of the Barcelona Open Banc Sabadell at Real Club De Tenis Barcelona on April 25, 2019 in Barcelona, Spain. (Photo by Quality Sport Images/Getty Images)

BARCELONA, SPAIN - APRIL 25: Kei Nishikori of Japan returns a shot during his Men's round of 16 match against Félix AugerAliassime of Canada on day four of the Barcelona Open Banc Sabadell at Real Club De Tenis Barcelona on April 25, 2019 in Barcelona, Spain. (Photo by Quality Sport Images/Getty Images)
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