David Haye is in a "frightening" condition ahead of his clash with Dereck Chisora, according to his trainer Adam Booth.
The two meet at Upton Park on Saturday in a highly-controversial fight after the duo clashed at a press conference following Chisora's WBC title loss to Vitali Klitschko in February.
Booth has admitted that Haye is using his hatred for his opponent as training fuel.
"This is personal. This is way more personal than the Wladimir Klitschko fight. That was business, but he hates Dereck Chisora," Booth said.
"I've used his hatred of Dereck as fuel for training to make him do more. He wants it more. But come fight night he must fight an anonymous man and leave emotion out of it. David's got a lot of experience and has had grudge matches before. I know he can separate the two.
"David knows what's in front of him and he's sparred twice as many rounds for this fight as he has done for any other fight. He's in frightening shape and that's testament to the training he's done."
The fight takes place on Saturday, July 14.
