Deontay Wilder says Tyson Fury will look like a liar if he does not back up his bold claim that he will knock out the American.
Wilder does not believe Fury when he says he has switched styles for their rematch because he intends to stop him.
The unbeaten WBC heavyweight king has challenged him to deliver on his prediction that he will finish him inside two rounds when they clash in the early hours of Sunday at the MGM Grand Garden Arena.
“I don’t believe anything he says, but that’s going to be up to him – he said it,” said the Bronze Bomber.
“I’m a man of my word – when I say something, I mean it. He has to back up his words. If he doesn’t, he’s going to look like a liar.”
Fury is a master of mind games and may be messing with Wilder to make him think he will come after him when he really intends to fight on the back foot again.
But Wilder said: “My mindset is what it is, ain’t nothing knocking me off my game. Many people want to claim, ‘He’s getting in your head’, but he can’t get in my head.”
Fury must do what no fighter has done since 2008 to stop Wilder.
Russian Evgenyi Romanov was the last man to knock him out as an amateur and Wilder says that only happened because he was ill.
“I had the flu in that fight,” he said. “I was weak and my coach didn’t want me to go to Russia. I almost collapsed on the plane.
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“But I needed that experience as I was so far behind the Olympians.
“All those guys had been fighting for years, I started at 21. I started late, coming from Tuscaloosa, Alabama. If you talked about boxing there, they might look at you crazy and point you to the woods.”
Wilder, 34, won bronze at the 2008 Beijing Olympics and turned pro with his trainer Jay Deas after his defeat to Italian Clemente Russo in the semis left him disillusioned.
“Losing in the Olympics wasn’t that bad for me because they cheat all the time in the Olympics,” he said. “I’ve seen it with my own eyes. That’s why I turned pro – because I’ve seen referees being paid off.”
That loss to Russo was Wilder’s last and he rose through the professional ranks, winning the WBC title from Bermane Stiverne in 2015.
He has equalled his hero Muhammad Ali’s record of 10 successful heavyweight defences.
“Victory would show the world greatness lies within me,” he added.
“I’m tied with my idol Muhammad Ali and, once I beat Tyson Fury in devastating fashion, I will break the record outright.”