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Bronte Campbell (Top) of Australia and Liu Xiang of China react after the women's 50m freestyle semifinal swim-off at FINA World Championships in Gwangju, South Korea, on July 27, 2019. (Xinhua/Tao Xiyi)

Bronte Campbell (Top) of Australia and Liu Xiang of China react after the women's 50m freestyle semifinal swim-off at FINA World Championships in Gwangju, South Korea, on July 27, 2019. (Xinhua/Tao Xiyi)