Heavyweight contender Jarrell 'Big Baby' Miller believes IBF, IBO, WBA world champion Anthony Joshua (20-0, 20 KOs)is a knockout loss waiting to happen.
Miller is back in the ring this coming Saturday night in New York, when he makes his HBO televised debut against Polish giant Mariusz Wach.
Joshua was in action two weeks ago in Cardiff, when he retained his titles with a tenth round stoppage win over Carlos Takam.
The stoppage in the Takam fight was viewed as controversial by some, as the referee jumped in to wave off the contest while Takam was not seriously hurt or in serious trouble.
Miller believes Joshua's mental state was starting to fall apart when Takam was able to take his punches and continued to come forward.
Because of that, Miller feels that he'll knock Joshua out if they ever meet in the ring - which might be possible because Miller-Wach is the co-feature to Eddie Hearn's first event in the United States. Joshua is the top star of Hearn's promotional company.
"What I have seen, heard, and the way he fights, he's a mental midget," Miller told Sky Sports. "Once I get there I'm shutting that down.
"I can drown him in any round. I can drown him in the beginning, I can drown him later. It don't even matter. Takam wasn't even pushing the pace and he was getting tired. Imagine another heavyweight that is pushing the pace, and landing shots, who is bigger than him. It's a whole different animal. There's a lot of things when you put two big guys in there, and the other guy does not have the mental fortitude for that. He's never been built for that.
In 20 pro fights, Joshua has packed on a lot of muscle. For the fight with Takam, he weighed a career high 254-pounds. Miller feels the muscle is affecting Joshua's performances and expects that aspect to become the champion's downfall.
"No doubt in my mind, I will stop Anthony Joshua. "First of all, he's not a natural big guy. He started as a pro in the mid-220s. Now all of a sudden, he's 254, he's four pounds heavier than he was when he fought Wladimir Klitschko and he's a lot slower. His footwork is horrible. It's definitely affecting his performance, his stamina is not getting any better than the Klitschko fight, even with the muscle he's putting on," Miller said.
"I hope he keeps putting on muscle. By the time he fights me, then all I've got to do is move on him, tire him out, and then knock him out. It's a matter of time."