Anthony Joshua told Tyson Fury he was more than welcome to visit his gym and give him some advice ahead of his rematch with Oleksandr Usyk next year.
AJ was dethroned by the Ukrainian last month, but has since activated his contract clause to force a second fight.
He has also spent the last two weeks in America looking for potential new coaches to change his squad.
In a surprising interview, Fury threw his own hat in that ring.
The ‘Gypsy King’ told FOX Sports Australia: “I think if I trained Anthony Joshua for the fight with Usyk then he would definitely win the fight.
“I offer my services to him – to train him for his rematch. And I guarantee you he would win.
“I would make him fight like a great man.”
In response, Joshua has now told iFL TV, “Yeah, my dear, if he doesn’t take the money for this. I don’t know if he wants a book or two.
“It is more than welcome to walk through the door.
“You know he can even train with me too.
“I need a coach who lived it, who breathed it, so it will be perfect.
“It would be the easiest way to get him in the ring, I’m going to install a camera.
“Eddie [Hearn] will be there with a few cameras running it on Facebook or YouTube.
He continued, “Tyson can definitely come and watch me train, 100%.
“Fight is not fight, so he can certainly come in.
“He is more than welcome to come into the gym and give me some advice.
“I won’t fight him then anyway, so he doesn’t have to worry.”