Eddie Hearn has raised questions over Tyson Fury's chin amid increased speculation of a blockbuster heavyweight fight with Anthony Joshua.
Fury is just weeks away from fighting Oleksandr Usyk in the first heavyweight undisputed bout this century.
A rematch clause means a second fight will likely take place later this year with any other prospective challengers set to wait until 2025.
Joshua has moved himself back on top of the contender list after an impressive comeback year in 2023 and his explosive knockout win over Francis Ngannou last month.
Frank Warren and Eddie Hearn disagreed about Tyson Fury and Anthony Joshua fighting
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It's led to increased talks over a future fight between Fury and Joshua with Matchroom chief Hearn keen to get a deal done.
Frank Warren has no concerns about Fury's ability to get the job done against Joshua if the fight is eventually made.
The two iconic promoters appeared together on BoxNation's YouTube where they were both asked about their respective fighter's chances.
"I just think he's the better fighter," Warren started.
"He's got a better chin, got a better jab.
"His power matches his power and he's a winning fighter."
But when asked for his thoughts, Hearn replied: "I disagree on all counts.
"One of the first things we've disagreed on for a while.
Frank Warren feels confident Tyson Fury would win
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"I think AJ has a great jab. I'm not sure about Fury's chin now but he has shown a good chin in the past and certainly the ability to get up... I'm not sure it's there anymore.
"I didn't like the Ngannou knockdown. I think luckily for him Usyk's not a big puncher, but we'll see.
"It's no disrespect to Fury's chin, I just feel like the way that AJ is punching right now that actually the style suits AJ.
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"I think he can be aggressive in the fight."
When asked whether he feels confident Joshua will knock Fury out, Hearn added: "I do. I've always thought so but he lost his way.
"Right now, at this moment in time, I have no doubt that he does."