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Angelique Kerber of Germany returns the ball during the women's singles 3rd round match against Kimberly Birrell of Australia at the Australian Open in Melbourne, Australia, Jan. 18, 2019. (Xinhua/Lui Siu Wai)
Angelique Kerber of Germany returns the ball during the women's singles 3rd round match against Kimberly Birrell of Australia at the Australian Open in Melbourne, Australia, Jan. 18, 2019. (Xinhua/Lui Siu Wai)