Commentary The disappearance of Chinese tennis player Peng Shuai has triggered international concern over her whereabouts and safety. Calls for investigation over Peng’s sexual assault allegation against a retired Chinese official has been met by a delayed response from Beijing, which is questionable. Peng, a 35-year-old Grand Slam doubles champion, accused Zhang Gaoli of sexual assault before she became his mistress. Zhang, 75, served as the vice premier of China from 2013 to 2018. Peng posted the allegation on a Chinese social media platform on Nov. 2, and since then, she has not been seen in public. When the topic was no longer hot on the internet, her colleagues began to speak out. Two top global tennis professional bodies—the Association of Tennis Professionals (ATP) and the Women’s Tennis Association (WTA)—and top tennis players—including Serbia’s Novak Djokovic, Japan’s Naomi Osaka, and America’s Chris Evert—are all concerned about Peng’s safety. The WTA called for an investigation into …