The only knock-out Kiko Martinez has suffered in his career was inflicted by Carl Frampton.
We're just a week away from a testing re-match between the two men who've both held the European super bantamweight title. But this time there's a bigger prize at stake.
Since Frampton stopped Martinez in February of last year, the Spanish fighter has won and defended the world title.
I ask him if the first Frampton fight, his only loss by KO, was the toughest of his career.
"Maybe it was the hardest in my life," Martinez replies.
"It was a bad time in my personal life and all the things around the fight made it the hardest. But this time will be different.
"I'm a more complete person now. I'm mentally stronger. I'm ready."
The IBF world super bantamweight title fight will be a bigger event than the sold-out Frampton-Martinez fight at the Odyssey.
With a world title at stake, neither man wants to lose.
"Knowing I'm the champion is everything for me," says Martinez (31-4, 23 KOs).
"I'm going to give it everything and when I win I'll offer Carl Frampton (18-0, 13 KOs) another opportunity to fight.
"We should have a trilogy."
Frampton isn't buying the hype. "The first fight is in the past," he says. "This is a new confident Kiko.
"I'm expecting the toughest fight of career. Although I won the first fight, I don't like watching it," says Frampton.
""Because I see many mistakes I made. But I've learned from them and I know everything about Kiko now.
"He's a hard man. But I'm more prepared this time."
Saturday's Frampton-Martinez fight will be screened by BoxNation