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

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