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Serena Williams (L) of the United States talks with Dayana Yastremska of Ukraine during her women's singles third round match at the Australian Open in Melbourne, Australia, Jan. 19, 2019. (Xinhua/Bai Xue)
Serena Williams (L) of the United States talks with Dayana Yastremska of Ukraine during her women's singles third round match at the Australian Open in Melbourne, Australia, Jan. 19, 2019. (Xinhua/Bai Xue)