Ronaldo 'Jacare' Souza became the first UFC fighter to test positive for COVID-19 ahead of a scheduled bout in Florida on Saturday night.
His fight against Uriah Hall has been cancelled, but the UFC 249, which is a behind-closed-doors event, will proceed as scheduled.
Souza and two of his cornermen are asymptomatic, the mixed martial arts promotion said in a statement.
"All three men have left the host hotel and will be self-isolating off premises, where UFC's medical team will monitor their conditions remotely and will provide assistance with any necessary treatment," UFC said.
All fighters taking part in Saturday's event were tested for the coronavirus on arrival in Florida.


India's Pant ruled out of New Zealand ODI series
Egypt, Nigeria head into AFCON semis
City hail Semenyo’s instant impact after debut against Exeter
Morocco show their credentials in impressive quarter-final performance
Rosenior looks to emulate Man Utd's 'Class of 92' with young Chelsea squad