Kell Brook and Errol Spence went face-to-face in today's press conference
The pair went face-to-face to announce their clash for Brook’s IBF welterweight title on May 27 at the home of Sheffield United.
It started in respectful fashion with both men praising each other until a war of words between their trainers sparked a bout of verbal sparring between the fighters.
“This is mine and you made a big mistake,” said Brook as he pointed to his IBF belt.
“Go sightseeing around Sheffield as that is all you will take from this – seeing some sights. This is staying here. You can come again.
“I’m the southpaw slayer, no southpaw has ever gone the distance with me.”
Kell Brook said Errol Spence is wasting his time trying to win the IBF belt
Errol Spence called Brook a 'clown'
American southpaw Spence is touted as the next big fighter to come from the States and is slight favourite with the bookmakers to hand Brook his second defeat after the Brit lost to Gennady Golovkin in September.
Unbeaten Spence said: “You’re a clown. You had two good rounds with GGG and you are living off that.
“How long you been pro and you only fought two fighters since you been pro? Shawn Porter and GGG.
“I’m going to knock you out and take that belt.
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“I’m coming here to take the title. I feel like I’m a better fighter than him. A true champion wants to take the title form a true champion, not a vacated title.
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“I want to beat the champion to become a champion. That is what true champions do.”
Brook’s trainer Dom Ingle and Spence’s Derrick James continued to exchange insults before promoter Eddie Hearn stepped in.
The boxers continued to trade insults as they did their customary face-off at the end of the press conference.
Brook was expected to move up to light-middleweight after facing middleweight king Golovkin last year.
But the Sheffield star refused to vacate his IBF welterweight title even if it means a struggle to get back down to 10st 7lb again.
He said: “There were no vacating for me.
“He has never fought an animal like me who is so determined to be great and unify this division.
“I know what I need to do though. I’m experienced. I need to follow the diet to a tee.
“I can’t sneak downstairs and get something from the fridge. It’s going to be a fantastic night for everybody in Yorkshire. We are going to see how brilliant he supposedly is.”