Daria Bilodid (blue) of Ukraine competes in the final of women's 48kg class against Funa Tonaki of Japan during World Judo Championships at National Gymnastics Arena in Baku, Azerbaijan on September 20, 2018. Daria Bilodid won the event to claim gold medal. ( The Yomiuri Shimbun via AP Images )

Daria Bilodid (blue) of Ukraine reacts after winning the final of women's 48kg class against Funa Tonaki of Japan during World Judo Championships at National Gymnastics Arena in Baku, Azerbaijan on September 20, 2018. Daria Bilodid won the event to claim gold medal. ( The Yomiuri Shimbun via AP Images )

Daria Bilodid (blue) of Ukraine competes in the final of women's 48kg class against Funa Tonaki of Japan during World Judo Championships at National Gymnastics Arena in Baku, Azerbaijan on September 20, 2018. Daria Bilodid won the event to claim gold medal. ( The Yomiuri Shimbun via AP Images )

Daria Bilodid (blue) of Ukraine competes in the final of women's 48kg class against Funa Tonaki of Japan during World Judo Championships at National Gymnastics Arena in Baku, Azerbaijan on September 20, 2018. Daria Bilodid won the event to claim gold medal. ( The Yomiuri Shimbun via AP Images )

Daria Bilodid (blue) of Ukraine competes in the final of women's 48kg class against Funa Tonaki of Japan during World Judo Championships at National Gymnastics Arena in Baku, Azerbaijan on September 20, 2018. Daria Bilodid won the event to claim gold medal. ( The Yomiuri Shimbun via AP Images )

Daria Bilodid (blue) of Ukraine competes in the final of women's 48kg class against Funa Tonaki of Japan during World Judo Championships at National Gymnastics Arena in Baku, Azerbaijan on September 20, 2018. Daria Bilodid won the event to claim gold medal. ( The Yomiuri Shimbun via AP Images )

(L-R) Funa Tonaki of Japan, silver, Daria Bilodid of Ukraine, winner, Raula Pareto of Argentina and Otgontsetseg Galbadrakh of Kazakhstan, bronze celebrate after women's 48kg class of World Judo Championships at National Gymnastics Arena in Baku, Azerbaijan on September 20, 2018. Daria Bilodid won the event to claim gold medal. ( The Yomiuri Shimbun via AP Images )

(L-R) Funa Tonaki of Japan, silver, Daria Bilodid of Ukraine, winner, Raula Pareto of Argentina and Otgontsetseg Galbadrakh of Kazakhstan, bronze celebrate after women's 48kg class of World Judo Championships at National Gymnastics Arena in Baku, Azerbaijan on September 20, 2018. Daria Bilodid won the event to claim gold medal. ( The Yomiuri Shimbun via AP Images )

(L-R) Funa Tonaki of Japan, silver, Daria Bilodid of Ukraine, winner, Raula Pareto of Argentina and Otgontsetseg Galbadrakh of Kazakhstan, bronze celebrate after women's 48kg class of World Judo Championships at National Gymnastics Arena in Baku, Azerbaijan on September 20, 2018. Daria Bilodid won the event to claim gold medal. ( The Yomiuri Shimbun via AP Images )

Daria Bilodid of Ukraine celebrates after women's 48kg class of World Judo Championships at National Gymnastics Arena in Baku, Azerbaijan on September 20, 2018. Daria Bilodid won the event to claim gold medal. ( The Yomiuri Shimbun via AP Images )

Ukraine's Daria Bilodid (blue) fights to win the gold medal against Japan's Funa Tonaki during the under 48kg women category of the 2018 Judo World Championships in Baku on September 20, 2018. (Photo by Mladen ANTONOV / AFP)

Ukraine's Daria Bilodid (blue) celebrates her gold medal after winning against Japan's Funa Tonaki during the under 48kg women category of the 2018 Judo World Championships in Baku on September 20, 2018. (Photo by Mladen ANTONOV / AFP)

Ukraine's Daria Bilodid poses with her gold medal after winning in the under 48kg women category of the 2018 Judo World Championships in Baku on September 20, 2018. (Photo by Mladen ANTONOV / AFP)