Carl Froch insists he is in the best possible shape for what he predicts will be a "barbaric" rematch with Mikkel Kessler.
The IBF champion will attempt to unify the super-middleweight division against WBA king Kessler at the O2 Arena on Saturday, in a fight promoter Eddie Hearn claims is the biggest in Britain for 10 years.
Froch suffered one of only two career defeats when he was controversially beaten on points in 2010 but the Nottingham man has always maintained his preparations were hit by a volcanic ash cloud that disrupted his journey to Denmark.
"My late preparation was definitely hampered; I didn't get into the ring firing on all cylinders," Froch, recalling his first career loss, told Sky Sports News.
"I draw a lot of confidence from the fact that I wasn't at my best physically and I still took Mikkel Kessler to the wire in a very close fight.
"When I turn up in the best possible shape, which is what I am in now, can he stay with me, can he live with me? When the fight goes into the championship rounds. I'm not sure he can but I'm not taking it for granted.
"It's going to be a tough job. You've got Kessler, who's fit and strong and talking about this maybe being his last fight. A dying man is a dangerous man.
"I'm not going to let this guy beat me again but I know it's going to be very tough. It could even be quite vicious and barbaric. We're both warriors at the top of our game.
"If we're really honest this is 50/50; it's there for me to win but it's there for me to lose.
"Physically all the hard work's been done, it's all about sharpening up now. It's about concentrating and making sure I'm really switched on and believe in myself. I need to focus and get the job done in style."
What is the likely outcome of Froch v Kessler II?
Froch wins by stoppage
Froch wins on points
Kessler wins by stoppage
Kessler wins on points