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Caroline Wozniacki of Denmark reacts during the women's singles first round match between Caroline Wozniacki of Denmark and Wang Yafan of China at the 2019 US Open in New York, the United States, Aug. 27, 2019. (Xinhua/Liu Jie)
Caroline Wozniacki of Denmark reacts during the women's singles first round match between Caroline Wozniacki of Denmark and Wang Yafan of China at the 2019 US Open in New York, the United States, Aug. 27, 2019. (Xinhua/Liu Jie)