Eddie Hearn is confident that Anthony Joshua would secure a huge victory against Tyson Fury if the pair were to meet in the ring.
The two British heavyweights are on a collision course for a unification bout, as long as Joshua defeats Oleksandr Usyk and Fury overcomes Deontay Wilder.
A fight between Joshua and Fury was initially scheduled to take place this summer but was suspended after an American court ruled Wilder could have his rematch with the Gypsy King.
But boxing supremo Hearn is confident his fighter would overcome Fury in a future bout and says he is still underrated.
"I believe AJ's getting better and better all the time, he will beat Tyson Fury," Hearn told the UMM YouTube channel.
"[Joshua] is so underrated. When you look at his resume, going back to Dillian Whyte, beating Charles Martin, fighting Klitschko, then Takam, then Povetkin, Parker, Ruiz, Ruiz, Pulev, Usyk, these are consecutive fights.
"There was no easy little gimmies on the way, do you know what I mean, that's something that like normally happens with a world champion that's been reigning five years.
"This guy's a throwback fighter, he's getting better and better, he needs all the respect in the world as a true heavyweight great now, not in time, let's appreciate him now.
"But I promise you that over time he will go down as one of the all-time heavyweight greats. I promise. And by the way, he's a proper, proper lovely fella.
"He grafts his nuts off every single day, he lives the right life, he wants to improve as an individual and as a fighter every single day, and you have to respect that."
