Joe Joyce will face British heavyweight rival Derek Chisora on 27 July in London.
Joyce, 38, is in the midst of a rebuild after successive defeats to Zhilei Zhang last year while Chisora has not fought since August 2023.
Chisora, who made his pro debut in 2007, has 47 fights compared to Joyce’s 18, with 13 losses.
The 40-year-old veteran of the sport says he intends to have three more fights before retirement.
“Joe is not going to win,” Chisora said at a news conference.
“He can train as much as he wants, but when it comes to the real grind of it, I’m more vicious than him.
“I fear no man. There’s no feeling each other out in the first round – I’m going in.”
Despite only being two years younger than Chisora, Olympic silver medallist Joyce turned professional late after a lengthy amateur career.
Joyce stormed through the rankings, securing a position as the WBO’s mandatory challenger before succumbing to shock defeats by China’s Zhang.