MASON, OHIO - AUGUST 17: Aslan Karatsev of Russia serves during his match against Marin Cilic of Croatia during Western & Southern Open - Day 3 at Lindner Family Tennis Center on August 17, 2021 in Mason, Ohio. (Photo by Dylan Buell/Getty Images)
MASON, OHIO - AUGUST 17: Aslan Karatsev of Russia serves during his match against Marin Cilic of Croatia during Western & Southern Open - Day 3 at Lindner Family Tennis Center on August 17, 2021 in Mason, Ohio. (Photo by Dylan Buell/Getty Images)