MADRID, SPAIN - MAY 08: Kei Nishikori of Japan in action against Hugo Dellien of Bolvia during day five of the Mutua Madrid Open at La Caja Magica on May 08, 2019 in Madrid, Spain. (Photo by Julian Finney/Getty Images)
MADRID, SPAIN - MAY 08: Kei Nishikori of Japan in action against Hugo Dellien of Bolvia during day five of the Mutua Madrid Open at La Caja Magica on May 08, 2019 in Madrid, Spain. (Photo by Julian Finney/Getty Images)