Joe Joyce will be without trainer Ismael Salas for the toughest fight of his career against Daniel Dubois.
Salas tested positive for Covid-19 having spent the last few weeks in Las Vegas working with his other fighters.
He has not come into contact with Joyce however and so the heavyweight clash will go ahead as planned.
"We were concerned about Salas going back to Vegas," Joyce's layer Adam Morallee said.
"Being in a gym around other fighters we were concerned that he might contract coronavirus, it was a risk.
"We put measures in place to make sure that when he arrived back in the country, he was isolated from everyone.
"He has been away from everyone, especially Joe, he has been in a separate hotel, he got a separate taxi here, he was tested alone and went to his room.
"Then his test came back positive and he had to go straight home."
Joyce will now be coached through the fight by the inexperienced Steve Broughton who will be assisted by Jimmy Tibbs.
The Olympic silver medalist had been in Las Vegas earlier this year preparing for Dubois but the coronavirus lockdown changed his plans.
He spent the month of October with Salas in Lonson before the Cuban flew back to Sin City.
Morallee added: "Joe should have trained in Vegas with his coach but coronavirus has screwed everything up for everybody.
“Salas is a top coach with a lot of fighters and he tried to prioritise Joe Joyce, he did get over here, but he had to go back to Vegas because he is a loyal guy.
"Did we think about bringing in another trainer? Yes. But we believe that Steve Broughton is a world-class trainer and we have the experience of Jimmy Tibbs, who has been in the corner for every Joe Joyce UK fight.
"Joe is absolutely fine, Steve has been his main trainer since May. We wanted Salas with us the whole time but he had to work with his other fighters so he was unable to. We knew the risks."
