Deontay Wilder believes Anthony Joshua will lost to Andy Ruiz Jr when they pair clash in their desert rematch.
Joshua was dropped four times and stopped in the seventh round by the Mexican-American in June.
The pair will meet again in Saudi Arabia on December 7 when Joshua will bid to win back his three heavyweight belts.
But Wilder claims Joshua will fail, as he doesn’t know why he lost in the first place.
As he opened a fast food restaurant in Yorkshire on Thursday, the world champion told the BBC : “I feel Joshua does not know how he lost, and that means he will not know how to set up a proper training camp – but anything is possible.
“Boxing is an amazing sport and you just do not know what is going to happen. That is why I love it.
“I saw Ruiz punch Joshua in the temple and it knocked his equilibrium out. He could not recover and that meant he got knocked down four times. When you are in a situation where you have not been before, it is like life teaching you a lot of lessons on the job.
“At that moment on the job for Joshua, he had to learn and could not pull through. But having fallen this time in life, the next time he might pull through because he has experienced it before and he should be able to correct the wrongs.”
Wilder also vowed to beat first Luis Ortiz and then Tyson Fury in his two scheduled rematches.
The American will face Ortiz in November and then Fury in February.
“Ortiz is definitely happening,” he added. “I am looking forward to fighting him. After I knock him out I will go to Fury, knock him out and then we will go for a unification.”