The hotly-anticipated rematch between Tony Bellew and David Haye is now just weeks away.

Having been originally scheduled for December, the bout had to be re-arranged after Haye injured his bicep in training, and was put back a further five months.

In fairness, it seemed unlikely that the former world heavyweight champion would ever box again after he ruptured his Achilles during the pair's first fight, which Bellew went on to win by knockout, causing an almighty upset.

'The Bomber' had his chances laughed off by most when stepping up to the maximum weight from crusierweight to take the fight, but in truth he was more than in control even before the injury to his opponent.

Bellew talked his chances of fighting several others after his unlikely victory, including Deontay Wilder and Joseph Parker, but he ended up granting a rematch, and the boxing world can't wait to see them meet again.

With all the glory that comes on fight night, a lot of people don't think about the toil and gruel that fighters go through in order to get there.

They have to be supremely fit and determined to make the weight required, and the training camps go on for weeks on end.

And the former WBC cruiserweight world champion has revealed his shocking regime to get himself in prime condition to beat Haye once again.

In his regular column in the Metro, Bellew described some of his gruelling sessions, which he is hoping will pay off come May.

"I do a session with weights attached to my arms, which is the hardest punching session you can do," he started. "That’s very demanding, but that’s on a Friday. I do some leg weights training on Friday afternoon and then there’s that treadmill session on Saturday morning.

"You’re looking at 21k speed on a treadmill. 30 seconds on, 30 seconds off. You do 20 sets of sprints. It’s very, very hard and I’m doing that on tired legs because of the leg session the previous day.

"I’ve got a hard regime that I have to follow. Ultimately it will pay off and I know David Haye is not doing what I’m doing. I know that.

"Not many people can do what I can do. People will always look at me and say I don’t look like I’m in great shape, but show me someone that can outlast me. No one can.

"I’ve beaten guys on fitness many, many times. Better fighters than me. Because I’m so determined and driven, and you can’t be that way unless you put in the hard work. You’ve got to push yourselves through the barrier.

It shows just how dedicated Bellew is to the game, and it's no real surprise that he upset the odds at the O2 Arena last year.

That is where they'll do battle once again, and when you read the Scouser's six-day training plan, you can expect him to be in peak condition.

Monday – 3 sessions
AM – Boxing
Afternoon – Boxing
PM – Swimming
Tuesday – 2 sessions
AM – Boxing
PM – Swimming
Wednesday – 2 sessions
AM – heavy weights
PM – Cardio work-out

Thursday – 2 sessions
AM – Boxing
PM – Swimming
Friday – 2 sessions
AM – Boxing
PM – Leg weights
Saturday – 1 session
AM – Treadmill sprints

Who'd be a boxer with all that?

That commitment is exactly why they went toe-to-toe for so many rounds during their first meeting, and if Bellew is right, then his effort gave him an added advantage that allowed him to come out on top.

It's sure to be an almighty tussle in seven weeks' time.