Dereck Chisora compared David Price to a sheep on his way to a slaughterhouse ahead of Saturday's bout at the O2 Arena.
The London-based fighter interupted Eddie Hearn during Thursday's press conference by played an audio clip of a sheep on his phone, before saying: "That's the sound of a sleep going to slaughterhouse."
He added: "I'm going to kill this guy. I am ready, nothing fazes me. I've been outboxed and I've never been knocked out and I am ready."
In response to the sheep clip, Price said: "I know Dereck needs this to get himself up for this fight. That's sound. Because the last thing Dereck needs is to be shaking my hand. We do like each other and it's fine, but this is business. 100 per cent."
Earlier, Regis Prograis insisted he was 'comfortable' in the UK ahead of his super-lightweight contest with Scotland's Josh Taylor.
Big Fight Night Details
- When: Saturday October 26
- Where: O2 Arena
- Television: Sky Sports Box Office (from 1900 GMT)
- Cost: £19.95 (Click here to book)
- Full Fight Card
Josh Taylor v Regis Prograis
Ybes Ngabu v Lawrence Okolie
Dereck Chisora v David Price
Ricky Burns v Lee Selby
Conor Benn v Steve Jamoye
Shannon Courtenay v Melinda Habran
Austin Williams v Miroslav Juna
Abass Barou v John O'Donnell
Denis Radovan v Luke Blackledge
"I'm expecting the best," the American fighter said, adding: "None of my 24 fights matter, none of his 15 fights matter, all that matters legacy-wise is this fight here."
Prograis arrived in the country three weeks ago and he said: "The UK fans have embraced me, I feel like I'm home. Right now I'm comfortable."
On his opponent, Prograis said: "I don't think he's better than me in anything, but he's good. Even before the (Super Series) tournament started I felt like 'Josh Taylor is the best in the world at 140 pounds apart from me'."
Taylor feels "100 per cent" he can knock out Prograis.
On his form going into the fight, Taylor said: "I'm in the best shape I've ever been in, switched on. All these fights on the line are going to bring out the best of me.
"I don't think he does anything better than me. I just want to get there and get it done now. 100 percent I feel like I can knock him out there."