MELBOURNE, AUSTRALIA - JANUARY 22: Frances Tiafoe of the United States hits a backhand to Rafael Nadal of Spain during day nine of the 2019 Australian Open at Melbourne Park on January 22, 2019 in Melbourne, Australia. (Photo by TPN/Getty Images)
MELBOURNE, AUSTRALIA - JANUARY 22: Frances Tiafoe of the United States hits a backhand to Rafael Nadal of Spain during day nine of the 2019 Australian Open at Melbourne Park on January 22, 2019 in Melbourne, Australia. (Photo by TPN/Getty Images)