WBA featherweight world champion Xu Can (R) of China attends a training session in Quanxing Boxing Club in Kunming, capital of southwest China's Yunnan Province, April 28, 2020. No set date has been given for a unificaiton bout betweem WBA featherweight world champion Xu Can of China and IBF featherweight world champion Josh Warrington of Britain, owing to the uncertainty caused by COVID-19 Pandemic. (Xinhua/Hu Chao)