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Alexander Zverev (L) of Germany and Andrey Rublev of Russia shake hands after the men's singles quarter-final match at the China Open tennis tournament in Beijing on Oct. 6, 2017. (Xinhua/Ju Huanzong)
Alexander Zverev (L) of Germany and Andrey Rublev of Russia shake hands after the men's singles quarter-final match at the China Open tennis tournament in Beijing on Oct. 6, 2017. (Xinhua/Ju Huanzong)