MELBOURNE, AUSTRALIA - JANUARY 26: Naomi Osaka of Japan serves to Petra Kvitova of the Czech Republic during day 13 of the 2019 Australian Open at Melbourne Park on January 26, 2019 in Melbourne, Australia. (Photo by TPN/Getty Images)
MELBOURNE, AUSTRALIA - JANUARY 26: Naomi Osaka of Japan serves to Petra Kvitova of the Czech Republic during day 13 of the 2019 Australian Open at Melbourne Park on January 26, 2019 in Melbourne, Australia. (Photo by TPN/Getty Images)