FILE - Kamila Valieva, of the Russian Olympic Committee, reacts after competing in the women's free skate program during the figure skating competition at the 2022 Winter Olympics, Thursday, Feb. 17, 2022, in Beijing. Valieva tested positive for using a banned heart medication, and the result wasn't announced by anti-doping officials until after she'd won gold as part of the team competition, even though the sample was taken weeks earlier. (AP Photo/David J. Phillip, File)

FILE - Nathan Chen competes in the men's free skate program during the figure skating event at the 2022 Winter Olympics, Thursday, Feb. 10, 2022, in Beijing. Nathan Chen withdrew from the world championships on Wednesday, March 16, because of what he called a “nagging injury” that he’s been dealing with after winning at the Beijing Games. (AP Photo/Natacha Pisarenko, File)