British heavyweight Dillian Whyte says that Deontay Wilder has made "the worst mistake of his career" by splitting from co-trainer Mark Breland.
Breland was the man who threw in the towel during Wilder's loss to Tyson Fury but could hardly be blamed for his actions considering the state of the former WBC champion at the time.
Whyte - who parted ways from trainer Mark Tibbs - believes that the loss of Breland's in-ring experience will hurt Wilder in the long run.
"I think it's the worst mistake he's ever made because Mark Breland is the only person in his team that actually was a boxer and actually was a world champion," Whyte told Sky Sports.
"He was the only person that didn't care about money or fame."
According to Whyte, Wilder is allowing his ego to run away with him and is dropping the one man on his team who cares about the fighter's wellbeing more than a payday.
Wilder will miss Breland's in-ring experience
Whyte claimed that Breland likely prevented Wilder from sustaining a serious injury as Fury began to dominate the fight and land big punches.
"[Breland] was actually from an emotional point, someone who understands, thinking about his health and did the right thing by throwing the towel in, because he could have got seriously hurt.
"He was getting hit with punches that weren't knocking him out, they were concussing him. Mark Breland knows what it's like, because Mark Breland has been in the same position Wilder was in. He's someone that cares about the athlete and the boxing side of things.
"Not just 'Bomb Squad', nonsense. He doesn't care about that. He's the only one in the team; you don't see him running around and shouting and screaming. He's just a little quiet guy, does his job.
"Deontay Wilder is an idiot, he clearly can't see it. Good luck to him, it's his team, he can do whatever he wants. But I think it's a bad mistake. Mark Breland is the only one that knows boxing in his team."
Wilder is preparing to face Fury for a third time in a bid to regain the WBC title though the date and venue of the fight are yet to be confirmed while Whyte gets the chance to avenge his punishing defeat to Alexander Povetkin in November.