Paul Butler is confident of becoming a two-weight world champion when he takes on South Africa's Zolani Tete for his IBF super-flyweight title in Liverpool.
Butler won the IBF bantamweight title from British rival Stuart Hall last year but relinquished it immediately.
The 26-year-old, who is dropping a division for Friday's contest to fight at his natural weight, said: "He won't be able to cope with me in the ring.
"He's had 16 knockouts from 19 wins but they haven't come in great company."
Tete, who has lost three fights, won the title in July, travelling to Japan to defeat unbeaten home favourite Teiru Kinoshita on points.
And he has suggested he will "break" Butler's nose and "knock him out" at the Echo Arena.
"I'm not the champion because I bought the title, I fought for it and I fought hard for it - and that's what's going to happen on Friday," the 26-year-old said.
"I take nothing away from Paul, he's a good champion but we're not at the same level."
Ellesmere Port boxer Butler, who has won all 17 of his previous professional fights, responded: "We know he travels well, but he travels well against half-decent opponents.
"I am better than him. I am going to wear him down then knock him out."