ROTTERDAM, NETHERLANDS - FEBRUARY 15: Marton Fucsovics of Hungary serves to Kei Nishikori of Japan in their quarter final match during Day 5 of the ABN AMRO World Tennis Tournament at Rotterdam Ahoy on February 15, 2019 in Rotterdam, Netherlands. (Photo by Dean Mouhtaropoulos/Getty Images)
ROTTERDAM, NETHERLANDS - FEBRUARY 15: Kei Nishikori of Japan serves to Marton Fucsovics of Hungary in their quarter final match during Day 5 of the ABN AMRO World Tennis Tournament at Rotterdam Ahoy on February 15, 2019 in Rotterdam, Netherlands. (Photo by Dean Mouhtaropoulos/Getty Images)
ROTTERDAM, NETHERLANDS - FEBRUARY 15: Marton Fucsovics of Hungary celebrates a point against Kei Nishikori of Japan in their quarter final match during Day 5 of the ABN AMRO World Tennis Tournament at Rotterdam Ahoy on February 15, 2019 in Rotterdam, Netherlands. (Photo by Dean Mouhtaropoulos/Getty Images)
ROTTERDAM, NETHERLANDS - FEBRUARY 15: Kei Nishikori of Japan serves to Marton Fucsovics of Hungary in their quarter final match during Day 5 of the ABN AMRO World Tennis Tournament at Rotterdam Ahoy on February 15, 2019 in Rotterdam, Netherlands. (Photo by Dean Mouhtaropoulos/Getty Images)
