
Sarah Sjostrom of Sweden competes during the women's 50m butterfly swimming final at the 17th FINA Aquatics World Championships held in Budapest, Hungary on July 29, 2017. (Xinhua/Ding Xu)

Sarah Sjostrom of Sweden competes during the women's 50m butterfly swimming final at the 17th FINA Aquatics World Championships held in Budapest, Hungary on July 29, 2017. (Xinhua/Ding Xu)