MADRID, SPAIN - MAY 09: Frances Tiafoe of USA in action against Rafael Nadal of Spain during day six of the Mutua Madrid Open at La Caja Magica on May 09, 2019 in Madrid, Spain. (Photo by Julian Finney/Getty Images)
MADRID, SPAIN - MAY 09: Frances Tiafoe of USA in action against Rafael Nadal of Spain during day six of the Mutua Madrid Open at La Caja Magica on May 09, 2019 in Madrid, Spain. (Photo by Julian Finney/Getty Images)