China's Zhao Shuai retains title at taekwondo worlds

China's first gold medal at the 2019 world championships might have arrived earlier, but Zhao's girlfriend and fellow Olympic champion Zheng Shuyin was controversially disqualified by Moroccan referee Tarik Benradi on Friday when she was leading 20-10 over local competitor Bianca Walkden.

"I think every referee should be fair because the athletes have been working so hard, and it is not easy for them to have a chance to compete at the world championships," Zhao said.