Adam Booth told Ringside that fight fans will be in for a classic when David Haye battles Tyson Fury on September 28.
The British heavyweights have agreed to square off in a domestic dust-up at the Manchester Arena, and Haye's trainer Booth believes the combatants will provide ample entertainment when they clash live on Sky Sports HD Box Office.
The Londoner, who sat next to Fury in the Ringside studio just hours after an intriguing press conference at the Park Plaza Hotel, praised Haye's 24-year-old opponent, who is 21-0 as a professional.
But feels his man - who has not boxed since knocking out fellow Brit Dereck Chisora in the fifth round at Upton Park last July - will be too swift for Fury come fight night.
"Styles make fights and these two styles are going to gel for an explosive British heavyweight version of Hagler-Hearns - but [David will win] because speed kills," said Booth.
"Tyson has done a great job in a very short space of time of getting people caring about him and I take my hat off to him, because if people don't care they are not going to watch.
"I have looked at Tyson for a while and he has worked in the gym, improved and added elements to his game, so I have to prepare David for a better fighter than has been in the ring before.
"But I know how quick David is and how hard he hits and he is more experienced now, as he showed when he mauled [Dereck] Chisora, something that is not his style, when Dereck tried to suffocate him."
Fury's promoter Mick Hennessy, however, believes his charge, who has recorded a points triumph over Kevin Johnson and knocked out Steve Cunningham since Haye last laced up the gloves, will rise to the occasion this autumn.
Hennessy admits that Fury, who broke into song after defeating Cunningham inside Madison Square Garden in April, is a "showman", but insists that, despite throwing plenty of insults Haye's way, the 6ft 9in powerhouse will not take the former world champion lightly.
"Tyson is certainly not underestimating David but he believes in himself - he has always had confidence even when he was out of shape - and believes he will do a job," said Hennessy.
"He is a serious talent and a modern-day heavyweight; he has size but is very athletic, has a heart as big as a building and with the right discipline can go all the way.
"He is box office and a showman and his last fight [against Cunningham], which was great entertainment inside and outside the ring, has acted as a massive springboard and made this fight happen.
"But he is going to a training camp with [his uncle] Peter Fury, who is a great trainer and a perfectionist and will leave no stone unturned, so I know we will get the best Tyson Fury for this fight.
"And I assure you that the occasion will not get to him."