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Aryna Sabalenka of Belarus serves during the women's singles quarterfinal match against Zhu Lin of China at the 2017 WTA Tianjin Open tennis tournament in Tianjin, north China, Oct. 13, 2017. (Xinhua/Yue Yuewei)
Aryna Sabalenka of Belarus serves during the women's singles quarterfinal match against Zhu Lin of China at the 2017 WTA Tianjin Open tennis tournament in Tianjin, north China, Oct. 13, 2017. (Xinhua/Yue Yuewei)