Tyson Fury is 'very frustrated' at delays to his bout with Oleksandr Usyk, Frank Warren has claimed.
The two boxers confirmed a new date for their heavyweight showdown on Thursday at a heated press conference in London.
They had originally been expected to go to war on December 23 in Saudi Arabia.
However, they'll now meet in the ring on February 17 instead - in a match that has the makings of a classic.
Boxing news: Frank Warren has opened up on Tyson Fury after his bout with Oleksandr Usyk was confirmed for a date of February 17
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Fury was aggressive during his appearance in London, calling Usyk 'ugly' prior to the press conference and also labelling the Ukrainian a 'p***y'.
Warren, however, thinks the 35-year-old's rage is understandable - insisting Usyk and his camp have regularly pushed the fight back.
Speaking to the Daily Mail, the boxing promoter said: "Look the last time we signed for it last year, it was them who pulled out.
"Tyson's very frustrated. I think that frustration boiled over at the press conference in as much as, this has been a real irritant, everyone saying 'why isn't this going on'.
"We knew what the real truth was behind the scenes, fact is - it's on.
"Tyson will be there on the 17th, and I'm quite sure Oleksandr will be there too, and I think we're going to get something a little bit special."
Warren also insists Fury remains motivated to succeed as the Briton approaches the twilight years of his career.
The Gypsy King said on Thursday that he's already won all the belts before, leading to concerns over whether he's still got the hunger to win.
But Warren has no such worries and insists Fury is relaxed as the fight with Usyk creeps closer.
"He believes he's the best and he wants to be the best, and that's it," the promoter added.
"I suppose that is legacy, in itself, but he's not worried about the label.
"I think it's the fact that he can walk round and feel himself he's accomplished it (is what's important).
"For me, I think it's brilliant for his kids, that their dad's the undisputed champion, for his family, and I think for me, his promoter for a long time, I'll be as proud as punch that I was with him when he did it.
"And I hope he does do it. We'll find out on the 17th."
Eddie Hearn has pondered whether Fury will retire once the showdown with Usyk is out of the way.
That's something the boxing star himself has insisted won't be happening.
And Warren has now echoed his client's comments, insisting Fury has no reason to walk away from boxing right now.
"What would he know what Tyson Fury's going to do?" continued the 71-year-old.
"With the greatest respect to Eddie, he says a lot of things, he says - maybe one of his Vagina Monologues, I don't know - from my perspective, the fight is on, he doesn't want to retire.
"If he wants to retire after the fight, it doesn't matter what anybody thinks, he'll do it, if doesn't he won't.
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Tyson Fury and Oleksandr Usyk's boxing match will be a showdown for the ages
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"He's the guy who's getting in the ring and it's his choice.
"Me, I know how much he lives and loves boxing.
"What really is a problem for him is all the nonsense that goes on outside, people who say they want fights and won't sign for them.
"But it's all signed now."
