Peng Shuai: What we know so far
One of China's top tennis players, Peng Shuai, has accused former Vice-Premier Zhang Gaoli of sexually assaulting her.
Since she posted the accusations on social media, there has been concern about the tennis star's whereabouts. On Sunday, the International OIympic Committee said it had spoken with Ms Peng but questions about her wellbeing and safety remain.