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Wang Qiang(R) of China shakes hands with Ashleigh Barty of Australia after their women's singles fourth round match at the 2019 US Open in New York, the United States, Sept. 1, 2019. (Xinhua/Liu Jie)

Wang Qiang(R) of China shakes hands with Ashleigh Barty of Australia after their women's singles fourth round match at the 2019 US Open in New York, the United States, Sept. 1, 2019. (Xinhua/Liu Jie)