Liverpool's Commonwealth light-heavyweight champion Tony Bellew says he is prepared to go the distance to beat Ovill McKenzie on Saturday.
The Echo Arena rematch follows Bellew's victory over McKenzie in December.
He told BBC Radio Merseyside: "If he's preparing for a three-round fight, then he's in for a ruthless shock.
"This fight is going further than three rounds, unless I cop him with one of my shots early. I'm planning for a fight from one round to the 12th round."
Bellew added: "I'm not going in there looking for a knock-out, making bold statements or accusations. I'm going to box him and use my brain. I'm going to do a job on him.
"It could be a bit boring to begin with, but it will work. I can guarantee, when the end does come, it will be electrifying and people will be pleased and will get their money's worth."
The 28-year-old from Wavertree scored an eighth-round win against McKenzie last year.
He added: "If my plan isn't working in one round, I'll adjust.
"I can do all these different things, but he's a one trick pony. He's got a serious right hand and he's highly explosive in three rounds.
"I know what he does and he hasn't seen half of my capabilities yet. I'm better than him in every way."