Wilder was beaten in one of the all-time great heavyweight battles at Las Vegas’ T-Mobile Arena, where both men were floored to the canvas before Fury closed the show in round 11.
It proved an enthralling affair in Sin City, with Fury first dropping the American in the third round and then coming close to defeat when he was put down twice in the fourth.
However, the Gypsy King displayed his tremendous powers of recovery once again from the fifth onwards, battering a resilient Wilder from pillar to post before landing the knockout blow late on.
While Fury dominated the majority of the contest and cemented his status as the best heavyweight of his generation, Wilder has emerged with credit aplenty for showing the heart and bravery of a true warrior amidst a barrage of relentless punishment.
Yet, Hearn believes the Alabama man looked fatigued far too early in the fight, claiming his poor condition as early as the third round was “not normal”.
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“I just think Fury has got his number mentally. He absolutely terrorises him mentally and emotionally,” Anthony Joshua’s promoter told iFL TV.
“That’s the only reason I can think of why Wilder can’t stand up after two rounds, because Fury exhausts him and he’s so good at that.
“He couldn’t stand up, his legs were gone after three rounds. It was only his heart and his power that kept him in the fight.
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“Obviously he hit Fury with a great shot, he went down twice. The second one was a nothing knockdown but Fury was still all over the place – and by the way, Fury showed great bottle and heart to come back.
“But Wilder could not stand up. He was exhausted after three rounds, and that’s not normal. That’s not normal.
“Some heavyweights have got better tanks [than others]. Fury’s tank’s exceptional. But you can’t just say that’s how [Wilder] is, because you can’t have a championship fight at any kind of pace if you can’t stand up after three rounds.”
But Hearn also added: “[Wilder’s] heart and power kept him in the fight and nearly swung the fight at some stage, so you have to give him credit.
“That little spell, when he went down in the third round and Fury went down in the fourth round, that was a great couple of rounds. It was just all over the place, but unbelievable drama.”