The Women's Tennis Association has said that a call between Peng Shuai and the president of the International Olympic Committee does not address its concerns over the Chinese player's wellbeing.
An IOC statement after the call said Peng appeared to be safe and well.
Peng, 35, disappeared from the public eye for almost three weeks after she made sexual assault allegations against a senior Chinese minister.
Her absence triggered widespread international concern.
Sports stars and governments called on China to provide proof that she was safe.
The outcry over the tennis star's apparent disappearance from the public eye prompted Chinese state media to release a series of photographs and videos that appeared to show all was well.