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Japan's Naomi Osaka serves during the singles second round match against Venus Williams of the United States of America at 2017 WTA Hong Kong tennis Open in Hong Kong, south China, Oct. 11, 2017. (Xinhua/Lo Ping Fai)
Japan's Naomi Osaka serves during the singles second round match against Venus Williams of the United States of America at 2017 WTA Hong Kong tennis Open in Hong Kong, south China, Oct. 11, 2017. (Xinhua/Lo Ping Fai)