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Angelique Kerber of Germany returns the ball during the women's singles third round match against Camila Giorgi of Italy at the 2020 Australian Open tennis tournament in Melbourne, Jan.25, Australia, 2020. (Xinhua/Zhu Wei)

Angelique Kerber of Germany returns the ball during the women's singles third round match against Camila Giorgi of Italy at the 2020 Australian Open tennis tournament in Melbourne, Jan.25, Australia, 2020. (Xinhua/Zhu Wei)