IBF title-holder Josh Warrington is a "30-year-old baby" who only dares to fight at home, said Chinese WBA champion Xu Can here on Friday.
Warrington accused Xu Can of being unwilling to fight in an empty arena, which led to their unification bout to "fall through".
"If you know the situation of the COVID-19 pandemic in Britain, you would say that's insane to fight next month," said Xu Can in a video released to Xinhua.
Another 37,892 people in Britain have tested positive for COVID-19, bringing the total number of coronavirus cases in the country to 3,543,646, according to official figures released Thursday.
Xu said his team has invited Warrington several times to fight in China or a third country, but Warrington declined.
"A 30-year-old baby, who only wants to fight at home, is now pointing his finger at me? Really?"
Warrington also vacated his IBF title "after the IBF refused to sanction his proposed unification fight in April".
"Today let me tell this to Mr. Warrington: I dare to fight you anywhere anytime. Do you dare to?"
According to Xu, his coaching team is waiting in Europe for him to join them soon. Once the situation in the UK is safe enough, he will be ready to fight.
