
Petra Kvitova of Czech Republic celebrates during the women's 4th round match between Petra Kvitova of Czech Republic and Amanda Anisimova of the United States at the 2019 Australian Open in Melbourne, Australia, Jan. 20, 2019. (Xinhua/Lui Siu Wai)

Petra Kvitova of Czech Republic celebrates during the women's 4th round match between Petra Kvitova of Czech Republic and Amanda Anisimova of the United States at the 2019 Australian Open in Melbourne, Australia, Jan. 20, 2019. (Xinhua/Lui Siu Wai)