Kei Nishikori (JPN) in action against Diego Schwartzman (ARG) during Quarter Final Match at Internazionali BNL D'Italia Italian Open at the Foro Italico, Rome, Italy on 10 May 2019. (Photo by Giuseppe Maffia/NurPhoto via Getty Images)
Kei Nishikori (JPN) in action against Diego Schwartzman (ARG) during Quarter Final Match at Internazionali BNL D'Italia Italian Open at the Foro Italico, Rome, Italy on 10 May 2019. (Photo by Giuseppe Maffia/NurPhoto via Getty Images)