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Dominic Thiem of Austria hits a return during the men's singles first round match against Adrian Mannarino of France at the Australian Open tennis championship in Melbourne, Australia on Jan. 21, 2020. (Xinhua/Zhu Wei)
Dominic Thiem of Austria hits a return during the men's singles first round match against Adrian Mannarino of France at the Australian Open tennis championship in Melbourne, Australia on Jan. 21, 2020. (Xinhua/Zhu Wei)