George Groves says he let himself down, that he got 'complacent for a split second and paid the price', in his super-middleweight contest with Nottingham's Carl Froch.
He is hoping that his new fan base sticks by him in future though:
"I'm very disappointed with tonight. Very, very disappointed. I'll go back and I'll watch it back and no doubt I'll be even more disappointed and frustrated. I feel like I've let myself down because that fight was there for me to win...
...I got complacent for a split second and I paid the price. It's world class boxing so I have to eradicate that from my game. But, I hope the fans stick with me, I hope they carry on supporting me and I'll certainly do them proud as quickly as possible."
Carl Froch says he would like to fight in Las Vegas before he retires. Speaking after beating George Groves in front of a sell-out 80,000 crowd at Wembley last night, he said:
"If that fight there is all I do now in boxing, I will be a happy man! Now I'm not saying that's the end for me, but all I'm saying is, that will be hard to top. I don't know what Eddie can produce or offer me now that's going to be anything close to that, because that was just unbelievable...
...But there is one box that's left to tick and that's Las Vegas; all the greats before me have ticked that box and they've been there and I've not had my name up in lights in the fight capital of the world and it would be nice to do that before i do decide to bow out...
...So i need a long think, but I just want to get back and have a beautiful summer with my beautiful family!"
Carl Froch's promoter, Eddie Hearn, says Carl needs time off while he finds exciting options to try to convince Carl to fight again:
"We had a chat at his flat today and I said to him 'as sad as it is, this fight means so much, because this is what you're going to be remembered for'. He's heaped so much pressure on himself - like he said he's had George Groves in his head and in his ear for a year now...
...it's time for him to have a lovely summer break and for me to carve out any opportunities and to present them to Rob and Carl. If they float his boat then I'm sure he'll fight again. If they don't, who knows?!"
Carl Froch's coach from Birmingham, Rob McCracken, says they had worked on the knockout punch but also on left hook and body shots in the build-up to the fight.
Speaking after the biggest post-war fight in British boxing history, he also tipped Groves to bounce back:
"We practiced it a lot! We practised the left hook a lot and we practised his body shots too, which I think in fairness were a lot quicker that they were last time. He was pretty rapid when he got anywhere near George with the body punching and I think that slowed George down a little bit...
...But Carl Froch is a tremendous fighter, he's a prize fighter, he knows how to box, he knows how to fight and he knows how to win at the elite level and he's done that over the last six years consecutively and he went on to do that tonight...
...But, you know, Groves is a tremendous prospect and I'm sure he'll come again."
Car Froch says the right hook that 'finished the job' against George Groves, was the best punch he'd thrown in his life:
"How do you define a good punch and what it means? Well what that meant was, that in the whole George Groves saga and the history of the fight - the way people are going to look back on that in years to come - that was the right hand that finished the job...
... So, yeah, that was the best punch I have thrown in my life!"
Carl Froch says he would have retired and that his career would have been over if he had lost his Super-Middleweight clash with George Groves on Saturday night:
"I didn't want to go out of my career, or finish my career - because my career would've been over, I would've retired if I had lost tonight - I didn't want to go out like that and be remembered, in the biggest night in the history of British boxing post-war, as being the loser!
I take nothing away from George Groves but i came here tonight to win! I lived like a monk for three months and I listened to everything Rob McCracken said for three months. It's been hard to put my body through pain, but if you prepare correctly you get the results and that's what i did."
Carl Froch has weighed in heavier ahead of this IBF and WBA Super Middleweight world title rematch with George Groves at Wembley tomorrow.
The boxer from Nottingham tipped the scaled at 1st 13lbs 9oz, and his adversary weighed in at 11st 12lbs 4oz.
The pair also came face to face for photographs, and an exchange of words. It was the last opportunity for each to play mind games, ahead of what has been labelled as one of the biggest fights in British boxing history.
The weigh-in for Nottingham boxer Carl Froch's fight with George Groves is just about to get underway in London.
Press play on the video below to watch live coverage.
For more on the background to the fight, click here.
In a few hours Nottingham's Carl Froch will come face to face with George Groves for the final time, before they meet in the biggest boxing bout in post-war history.
The fighters will weigh-in this afternoon at Wembley Arena, ahead of their title fight in front of 80 thousand people at Wembley Stadium tomorrow.
Our Sports Correspondent Steve Clamp sent this report.