David Haye insists Amir Khan remains a box-office attraction despite his disastrous performance against Danny Garcia in Las Vegas last weekend.
IBF super-middleweight world champion Carl Froch has already described Khan's career as a "write-off" after enduring his second brutal knockout since turning professional, but the Bolton fighter has vowed not to retire.
But Haye, who flattened Dereck Chisora in five rounds at Upton Park on Saturday, insists only a fool would write his boxing obituary.
"People are writing Amir Khan off, but they do that at their peril," Haye said.
"He's been written off in the past when he was knocked out by Breidis Prescott.
"People said he was finished, that he was chinny and had no heart.
"But he came back and won world titles. Lennox Lewis was knocked out twice by Oliver McCall and Hasim Rahman, should he have given up then?
"He will still get the big fights, guaranteed, because he's Amir Khan and puts bums on seats.
"He's a young, 25-year-old fighter who can produce the goods when it counts.
"It was just an off night for him and he'll make everybody eat their words – just like he did after losing to Prescott.
"I remember the write-ups after that defeat, but look at their careers now – Prescott's a journeyman while Khan won a couple of world titles."
Haye insists Khan is determined to address the shortcomings that enabled Garcia to cause such a dramatic upset.
"Amir was being groomed to fight Floyd Mayweather but, obviously, that's been pushed back," Haye said.
"But I guarantee he will figure out what he did wrong and will come back stronger.
"I talked to Amir before and after the fight, and he knows what he must address in the gym to become a better fighter."