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Duncan Scott of Britain celebrates after the men's 4x100m medley relay final at the Gwangju 2019 FINA World Championships in Gwangju, South Korea, on July 28, 2019. (Xinhua/Bai Xuefei)

Duncan Scott of Britain celebrates after the men's 4x100m medley relay final at the Gwangju 2019 FINA World Championships in Gwangju, South Korea, on July 28, 2019. (Xinhua/Bai Xuefei)