Tony Bellew is not expecting Tyson Fury to last too long in a potential fight with WBC heavyweight champion Deontay Wilder.
Fury is back in his second fight of the year on Saturday night, when he faces Francesco Pianeta at Windsor Park in Belfast.
Should Fury (26-0, 19 KOs) win - he is very close to a deal to fight Wilder (40-0, 39 KOs) on a Showtime Pay-Per-View date in November.
Fury was in the ring back in June, when he stopped Sefer Seferi in a four round mismatch.
That contest was Fury's first bout since November of 2015, when he shockingly defeated Wladimir Klitschko for the heavyweight titles.
Fury vacated his belts after losing his license to box the following year.
"At the minute it's a bit of a freak show with Tyson Fury," Bellew told Sky Sports.
"But to be fair he has been out of the ring for the best part of three years and he hasn't lived the best lifestyle, so you can't expect to come back into this sport and this business and take on top competitors.
"He is definitely not ready for Deontay Wilder. Pianeta is a 6ft 5in, 17 1/2 stone southpaw. How is that preparing him - in any way, shape or form - for a 6ft 7in, possibly the biggest puncher in the whole world?"
Bellew has been chasing a fight with Fury. While he admits Wilder would be too big and too strong, Bellew does not view Fury in the same manner.
Even if Fury was at his best - Bellew would still pick Wilder to win.
He feels Wilder's style is completely wrong for Fury.
And regarding the modern day Fury - Bellew is predicting a knockout loss in three rounds or less.
"I don't think he'd ever beat Wilder," said Bellew. "Styles make fights but when you're talking about Wilder, no-one knows what he is going to do - because he doesn't know either. I always thought David Haye would beat Fury, because of the styles. Tyson Fury is a vulnerable heavyweight, there's no two ways about that.
"He is not a big man who can absorb everything. He is vulnerable and he can be hurt, and when you are coming across guys with the speed and explosive power, like Deontay Wilder and Haye, it isn't good. Fury against Wilder would be over in three rounds, at the most."