ROTTERDAM, NETHERLANDS - FEBRUARY 15: ABN Amro WTT Kei Nishikori, during the ABN AMRO World Tennis Tournament at the Ahoy Rotterdam on February 15, 2019 in Rotterdam Netherlands (Photo by Jan Kok/Soccrates/Getty Images)
ROTTERDAM, NETHERLANDS - FEBRUARY 15: ABN Amro WTT Kei Nishikori, during the ABN AMRO World Tennis Tournament at the Ahoy Rotterdam on February 15, 2019 in Rotterdam Netherlands (Photo by Jan Kok/Soccrates/Getty Images)