David Haye insists he will stop world heavyweight champion Wladimir Klitschko inside the distance in their eagerly anticipated bout on June 20.
'The Hayemaker' will challenge the IBF, WBO and IBO title holder at Schalke's famous football ground in Germany this summer.
And, despite Klitschko's impressive record - 52 wins (46 KOs) and three losses - the 28-year-old London bomber is confident he can rule the world.
He demolished Monte Barrett with a fifth round knockout in his first bout at the weight in November and is adamant the fight against the Ukrainian had to be made.
"If I did not fight Wladimir now, he would never fight me," said Haye. "I would keep knocking people out like I have done all my career and he would just keep running away from me. He fights people who are over the hill and finished.
"He thinks I am a small guy from cruiserweight but on June 20 he will find out that I am a real heavyweight.
"He has a mental weakness. He got hurt by people who were not supposed to hurt him. I will expose his heart and his chin.
"When it gets rough, he goes down. Unless Wladimir gets his chin transplanted, he will not get to the 12th round. It will not happen."
Haye believes Wladimir is overrated and feels he can take out older Klitschko's older brother Vitali, who holds the WBC belt, after his success.
"I will dispose of the whole family," he added. "I could beat them on the same night, but I will take out Wladimir first and Vitali in the next fight. Maybe Vitali can jump in to save his brother.
"But he looks old and grey now. I will get Vitali to throw the towel, he will have to pick his brother up from the floor and carry him out of the ring."
Wladimir is also talking tough, though, and has clearly taken a disliking to his opponent, who wore a t-shirt with a caricature of him holding the Klitschkos' heads in his hands.
"I am sad we did not fight at Chelsea's stadium. I was looking forward to that. David and his manager had promised it to me and I thought it would be a nice challenge to fight in such a stadium," Klitschko said.
"But from him all that came was hot air. He is just a trash talker. I am disgusted at his behaviour, especially at his t-shirt, and I will make him pay for it.
"It will be a long and fun process to knock him out in the 12th round."