MASON, OHIO - AUGUST 13: Madison Keys returns a shot to Garbine Muguruza of Spain during the Western & Southern Open at Lindner Family Tennis Center on August 13, 2019 in Mason, Ohio. (Photo by Matthew Stockman/Getty Images)
MASON, OHIO - AUGUST 13: Madison Keys returns a shot to Garbine Muguruza of Spain during the Western & Southern Open at Lindner Family Tennis Center on August 13, 2019 in Mason, Ohio. (Photo by Matthew Stockman/Getty Images)