Tyson Fury fought Deontay Wilder, but Mike Tyson is certain Francis Ngannou will be the hardest puncher he’s faced and predicts upset greater than Buster Douglas KO

Mike Tyson has made a couple of bold claims ahead of Tyson Fury vs Francis Ngannou.
The legendary former undisputed heavyweight world champion will be training the ex-UFC superstar for his bout with boxing's current heavyweight king on October 28 in Saudi Arabia.
Of course, Fury is an enormous favourite in the bout against the MMA fighter, who will be making his boxing debut.
However, Tyson has joined Ngannou's camp and is adamant that his charge - famous for his huge KOs in the UFC - possesses the power to hurt Fury.
Tyson told : "Absolutely, Tyson Fury got dropped by a small guy [Steve Cunningham] early in his career.
"This guy punches like God knows who, he moves quicker, I've worked with his speed.
"Listen man, he only has to land one or two.
"Tyson's never been in the ring with a guy that can punch this hard.
"I think this guy punches harder than anybody he's ever fought."
Deontay Wilder floored Fury four times in their three fights, but was unable to KO him.
In order to achieve this, Tyson thinks Ngannou will have to apply different tactics.
"He just needs gotta go all-out aggression," Tyson explained, "Punch him to the body, punch him to the head, as we've been working with.
"He's moving his head, he's getting it together and he's really determined to do this.
"He really wants to do this for his country and his people, it's patriotic pride. I'm very excited about this."
Tyson concluded by insisting that, should Ngannou pull off the victory, it would surpass his own historic defeat to Buster Douglas as the greatest upset in the history of the sport.
"It would be a bigger upset that Buster Douglas vs Mike Tyson," he confirmed.