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BARCELONA, SPAIN - APRIL 27: Kei Nishikori of Japan reacts during his Men's round of semi-final match against Daniil Medvedev of Russia on day six of the Barcelona Open Banc Sabadell at Real Club De Tenis Barcelona on April 27, 2019 in Barcelona, Spain. (Photo by Quality Sport Images/Getty Images)

BARCELONA, SPAIN - APRIL 27: Kei Nishikori of Japan reacts during his Men's round of semi-final match against Daniil Medvedev of Russia on day six of the Barcelona Open Banc Sabadell at Real Club De Tenis Barcelona on April 27, 2019 in Barcelona, Spain. (Photo by Quality Sport Images/Getty Images)