HALLE, GERMANY - JUNE 15: Kei Nishikori of Japan plays a forehand in his match against Ricardas Berkankis of Lithuania during day 4 of the Noventi Open at OWL-Arena on June 15, 2021 in Halle, Germany. (Photo by Thomas F. Starke/Getty Images)
HALLE, GERMANY - JUNE 15: Kei Nishikori of Japan plays a forehand in his match against Ricardas Berkankis of Lithuania during day 4 of the Noventi Open at OWL-Arena on June 15, 2021 in Halle, Germany. (Photo by Thomas F. Starke/Getty Images)