FILE - China's Peng Shuai serves to Japan's Nao Hibino during their first round singles match at the Australian Open tennis championship in Melbourne, Australia, on Jan. 21, 2020. China's Foreign Ministry is sticking to its line that it isn't aware of the controversy surrounding tennis professional Peng Shuai, who disappeared after accusing a former top official of sexually assaulting her. A ministry spokesperson said Friday that the matter was not a diplomatic question and that he was not aware of the situation. (AP Photo/Andy Brownbill, File)

FILE - China's Peng Shuai serves to Japan's Nao Hibino during their first round singles match at the Australian Open tennis championship in Melbourne, Australia, on Jan. 21, 2020. The stand the women's professional tennis tour is taking in China over concern about Grand Slam doubles champion Peng Shuai's well-being could cost the WTA millions of dollars and end up being unique among sports bodies. The International Olympic Committee is preparing to host the Winter Games in Beijing in two months and has held calls with Peng to show she is doing well — but never raised the matter of the sexual assault allegations she made against a former Chinese government official. (AP Photo/Andy Brownbill, File)

FILE - China's Peng Shuai serves to Japan's Nao Hibino during their first round singles match at the Australian Open tennis championship in Melbourne, Australia, on Jan. 21, 2020. The controversy surrounding Chinese tennis star Peng Shuai’s accusations of sexual assault against a former top politician continues to cast a shadow of the Beijing Winter Olympic Games that officially begin on Friday, Feb. 4. 2022. Peng disappeared from public view in November, 2021, after accusing former Communist Party official Zhang Gaoli of sexual assault. (AP Photo/Andy Brownbill, File)