World tennis champion Naomi Osaka has become the latest athlete to voice concerns over the whereabouts of Chinese tennis player Peng Shuai.
One of China's biggest sporting stars, Ms Peng has not been heard from since she made sexual assault allegations against a top Chinese official.
The Women's Tennis Association (WTA) said it had confirmed that she is "safe and not under any physical threat".
However, they were not able to directly reach her.
"I was recently informed of a fellow tennis player that has gone missing shortly after revealing that she has been sexually abused," Ms Osaka tweeted, using the hashtag #WhereisPengShuai.