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Gold medalist Yuliya Efimova of Russia reacts after the women's 200m breaststroke final at FINA World Championships in Gwangju, South Korea, on July 26, 2019. (Xinhua/Bai Xuefei)

Gold medalist Yuliya Efimova of Russia reacts after the women's 200m breaststroke final at FINA World Championships in Gwangju, South Korea, on July 26, 2019. (Xinhua/Bai Xuefei)