MASON, OH - AUGUST 14: Borna Coric of Croatia returns a shot to Danill Medvedev of Russia during the Western & Southern Open at Lindner Family Tennis Center on August 14, 2018 in Mason, Ohio. (Photo by Matthew Stockman/Getty Images)
MASON, OH - AUGUST 14: Borna Coric of Croatia returns a shot to Danill Medvedev of Russia during the Western & Southern Open at Lindner Family Tennis Center on August 14, 2018 in Mason, Ohio. (Photo by Matthew Stockman/Getty Images)