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Adrian Mannarino of France serves during men's single's first round match against Kevin Anderson of South Africa at the 2019 Australian Open in Melbourne, Australia, Jan. 14, 2019. Kevin Anderson won 3-1. (Xinhua/Hu Jingchen)

Adrian Mannarino of France serves during men's single's first round match against Kevin Anderson of South Africa at the 2019 Australian Open in Melbourne, Australia, Jan. 14, 2019. Kevin Anderson won 3-1. (Xinhua/Hu Jingchen)