Former two division champion David Haye, the manager of heavyweight contender Derek Chisora, broke down the recent sparring session that his boxer had with former unified world champion Anthony Joshua.
Joshua is deep in training for his scheduled rematch with Andy Ruiz, which takes place on December 7th in Saudi Arabia.
Back in June, Ruiz shocked the sport when he dropped Joshua four times to secure a seventh round stoppage and the WBO, IBF, WBA, IBO heavyweight titles.
Haye explained that Joshua is in top form, according to Chisora, and ready for rematch.
"He sparred with AJ, he didn't even tell me," Haye said to Sky Sports. "Normally he wouldn't do it. But he's ticked over in the gym and said he enjoyed sparring."
"Derek was impressed. AJ was super-fit, in great shape, focused on his boxing. All the right noises were coming out of the camp. There were multiple sparring partners including Bryant Jennings. AJ has slimmed down - if you're going to have a long-range boxing match then trim off any unnecessary muscle."
Chisora, who recently knocked out David Price, is training extremely hard to land one final world title shot.
"Derek's mind-set now has the willingness to pay the price in training," said Haye. "He focuses on the fundamentals of hard work - it is not fun to work hard and to eat boring meals. He's done that in the past but now he's lean and mean. Straight after his fight [with Price] he said: 'I need to lose weight'.
"He has an extra stone of weight that he is carrying. He can still do sprints, deadlifting and sprints. But a 120kg [18st 13lbs] Chisora would lose to a 113kg [17st 11lbs] Chisora who would have faster reactions. He understands that and says he will lose weight."