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Roger Federer of Switzerland returns a shot during the men's singles third round match against John Millman of Australia at the 2020 Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2020. (Xinhua/Zhu Hongye)
Roger Federer of Switzerland returns a shot during the men's singles third round match against John Millman of Australia at the 2020 Australian Open tennis tournament in Melbourne, Australia, Jan. 24, 2020. (Xinhua/Zhu Hongye)