Riddick Bowe says with three months of training, he'd whoop the hell out of Deontay Wilder ... and the dude is dead serious.
"I'd tap that ass," Riddick tells TMZ Sports.
Bowe is 50 years old now and Deontay's a 33-year-old coming off the fight of his life ... but the boxing legend says none of that matters.
"If you gave me three months, I'd tap that ass. Give me three months, we could do it ... If you gave me three months, yessir. Without question.