The career of former flyweight world titlist Zou Shiming, by far China’s biggest boxing star, is likely over due to ongoing left eye problems. Zou, who suffered an apparent detached retina and lost vision in his left eye while flying from Shanghai to Beijing on Dec. 23, has had various issues with his eye. Zou (9-2, 2 KOs), 36, won three Olympic medals, including consecutive gold medals in 2008 and 2012. He turned pro with fanfare in 2013 and was responsible for making Macau the center of Asian boxing for a few years. Trained by Freddie Roach, he got a shot at then-flyweight titlist Amnat Ruenroeng in 2015 and lost a decision. In 2016, in Las Vegas, he won a lopsided decision against Prasitsak Phaprom to claim a vacant world title but then lost it by 11th-round knockout to Sho Kimura in his first defense in Shanghai in July.