Chinese player Peng Shuai has still not directly been in contact with the Women's Tennis Association (WTA), which says "no amount of money" would stop the tour pulling events out of China.
Peng has not been heard from since she made sexual assault allegations against a top Chinese government official.
WTA chairman Steve Simon told the BBC there will be no events in China next year without proof that Peng is safe.
"We cannot stand by compromises. This is a right and wrong issue," he said.
The WTA has been told Peng is safe, and in Beijing, by the Chinese Tennis Association, although Simon said there has been no confirmation that is true.