Tennis must unite over Chinese player: Djokovic

Former doubles world number one Peng has not been seen or heard from publicly since saying on Chinese social media on Nov. 2 that former vice-premier Zhang Gaoli coerced her into sex.

Amid growing concern about her whereabouts, the Women's Tennis Association (WTA) has threatened to pull tournaments out of China and the men's ATP has demanded clarity from the Chinese authorities.

Asked for his thoughts following his victory over Cameron Norrie at the ATP Finals on Friday, Serbian Djokovic said he supported the WTA's threat "100 percent".

"I support the statement of WTA as an organization and also their president absolutely," he told reporters.

"The whole community, tennis community, needs to back her up and her family, make sure that she's safe and sound because if you would have tournaments on the Chinese soil without resolving this situation, it would be a little bit strange.