Chris Eubank Jr. explained why he took a rematch against Liam Smith.
The pair fight this Saturday in Manchester in a second fight, after Smith secured a dominant win in the fourth round of their fourth outing.
Smith is 35 and Eubank 33, so it is potentially the last fight for one or both of the men, particularly the loser.
However, Eubank told Sky Sports that he needed to run it back to put the record straight.
He said: "I guess if I was going to take any positives from that fight, it would be that. People know that I'm not fake, that I'm not a phoney, that I don't just give up when the going gets tough," he said.
"You put me in a hairy situation and I'm going to find a way out every which way I can, until the referee says no.
"I'm cornered. I'm in a corner. It's my own doing. I put myself in the corner. I didn't have to take this rematch. But it's principle. I can't let this guy get away with thinking that he's a better fighter than me and having other people think he's a better fighter than me," Eubank said.
"I can't let him get away with that. I could have taken other fights for more money, bigger names but I wanted to right this wrong. I don't want to move on. I don't want to let this guy slip away.
"I don't want him to go off into the sunset saying: 'Yeah, yeah, I beat Eubank'. We need to right that wrong. We need to get that getback before I can go on to these other guys."
"It's do or die. No other option. The objective is simple. Go out there and win by any means necessary within the rules of boxing. You have no other choice," he said.
"It gives you a new focus, a new determination that maybe wasn't there in the first fight, a new fear.
"The fear of losing twice. That's more of a fear than getting hurt or knocked out, getting cut, none of that compares to the thought of losing. So I'm a caged lion right now. Let me out.
"Liam has got a new confidence about him now," he added. " He's going to believe he can go out there and do the same thing. I have to combat that confidence, I have to shut that out and that's not going to be easy. That's what I have to do.
"I think it's going to be extremely tough."