
Yuliya Efimova of Russia competes during the women's 4x100m medley relay final at the 17th FINA World Championships held in Budapest, Hungary on July 30, 2017. (Xinhua/Ding Xu)

Yuliya Efimova of Russia competes during the women's 4x100m medley relay final at the 17th FINA World Championships held in Budapest, Hungary on July 30, 2017. (Xinhua/Ding Xu)