Michael Jennings has warned his welterweight rivals - including Kell Brook - that he's a new man.
Former world title challenger Jennings fights in an eliminator for the British title on March 12 in Scotland at the Braehead Arena, Glasgow.
He takes on Edinburgh's Gary MacMillan in what could be an explosive clash.
And Jennings believes that his rivals shouldn't write him off.
"I'm in my 30s, but I don't think there is a boxer in Britain who is in as good a shape as I am," said Jennings.
"I was gutted to lose to Kell Brook on a cut at a time when I thought that I was just coming into the fight.
"I still feel that I can beat Brook, and I'm desperate for another chance against him.
"If Kell goes on to win a world title, then who better than me to make a first defence against?
"I've still got so much to offer at the very highest level."
However Jennings is refusing to get too far ahead of himself.
"McMillan is going to be a tough nut to crack," said the Chorley star.
"He's awkward and he is going to be up for it in front of his own fans in Scotland.
"But as well as wanting a rematch with Kell, the other big thing playing on my mind is winning back the British title.
"I still feel I was robbed against Young Mutley.
"That fight seems like a long time ago now, but I never got another chance to fight for the British title, and it's always annoyed me.
"A perfect 2011 would see me take that Lonsdale belt back and then beat Kell Brook to lift a world title."