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Alexander Zverev of Germany competes during the men's singles second round match against Melek Jaziri of Tunisia at China Open tennis tournament in Beijing, China, Oct. 4, 2018.(Xinhua/Fei Maohua)
Alexander Zverev of Germany competes during the men's singles second round match against Melek Jaziri of Tunisia at China Open tennis tournament in Beijing, China, Oct. 4, 2018.(Xinhua/Fei Maohua)