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Polona Hercog of Slovenia returns a shot during the women's singles second round match against Ashleigh Barty of Australia at the 2020 Australian Open tennis tournament in Melbourne, Australia, Jan. 22, 2020. (Xinhua/Zhu Wei)
 
 
Polona Hercog of Slovenia returns a shot during the women's singles second round match against Ashleigh Barty of Australia at the 2020 Australian Open tennis tournament in Melbourne, Australia, Jan. 22, 2020. (Xinhua/Zhu Wei)