Tyson Fury believes Anthony Joshua is "finished" following his shocking defeat to Andy Ruiz Jr.
Joshua's stock massively dropped after suffering his first professional defeat to the Mexican-American challenger in New York.
He not only lost his heavyweight titles but also his spot as the No.1 heavyweight in world boxing.
Fury is now ranked as the best heavyweight in world boxing by The Ring Magazine ahead of Deontay Wilder, Ruiz Jr and Joshua.
The self-proclaimed 'Gypsy King' returns to the squared circle on Saturday against Tom Schwarz and ahead of his 29th professional bout, he's issued a brutal assessment of Joshua's career.
"When a man doesn't want to be there once, he will always do it and it's hard to come back from," he said about his heavyweight rival.
"It's been done many different times by many different fighters. He did it that night and I don't think he will come back from it. Finished. Ask any top trainer who has been around the sport a lifetime. When he got to the ring, I saw he didn't want to be there."
A rematch against the WBC world champion is set if Fury beats Schwarz, and he isn't bothered by anything Wilder brings to the table.
"If I was a match fit fighter and some fat man comes off drugs and alcohol and done that to me, I'd never look at the sport again," he added.
"Does Deontay Wilder have anything to bother me? Nothing at all.
"I've been hurt 1,000 times but Wilder didn't hurt me once. He hit me in the back of the head, scrambled my senses and the last knockdown was a touch of sleep but didn't hurt me. Those same punches that caught me then are not going to touch me when I'm match fit.
"They thought I'd be half the man. I had to con them to think I was only there for a pay day. I couldn't be at my best but still beat him at nowhere near my best. He isn't man enough to face me anymore or speak to me. He used to text me back and forth. I've text him five times and he hasn't replied once."
Wilder vs. Fury 2 is tentatively scheduled for 2020 while Joshua will rematch Ruiz Jr before the end of the year, after his promoter Eddie Hearn triggered the contracted rematch clause.