In November, Peng Shuai — one of China’s most popular tennis stars — took to Chinese social media to accuse Zhang Gaoli, who was a member of China’s seven-member ruling committee, of sexually assaulting her. Within minutes, Chinese censors had taken down Ms. Peng’s post, and, for weeks, no one sees or hears from her. We look at Ms. Peng’s story and what China’s attempts to censor her have meant for the sports industry.  Guest: Matthew Futterman, a sports reporter for The New York Times.