The next big fight in British boxing is tonight's clash between David Haye and Tony Bellew - a long-awaited rematch after their first meeting back in March of last year.

Haye v Bellew I ended with an 11th round TKO victory for Bellew, although Haye's ankle injury in the 6th prompted heavy calls for a return fight.

It's taken a lengthy negotiation progress and a rescheduled date but the wait is finally over for Haye v Bellew II.

Haye comes into the fight believing it to be his last chance in boxing - lose and he's done.

"If I can’t beat Tony Bellew, I’m man enough to know that boxing’s not for me anymore," he said.

Whether or not he can defeat the man who put him down a year ago is up for much debate as many pundits struggle to separate the two.

And boxing promoter Frank Warren believes there's a very simple reason why this fight is particularly difficult to call.

"On Saturday David Haye and Tony Bellew are in action, and this is a fight between two men past their best," he said in the Star.

"It will be intriguing to see what Haye has got left because we never know if he’s going into a fight injured or not.

"If he is at 100 percent he should win, but you never know with Haye."

It's a very fair criticism of Haye, who was not only injured in the first fight but also suffered an arm injury that postponed the second.

The rematch was supposed to take place in late December after negotiations were completed in September, only for Haye to pull out beforehand.

And so the 37-year-old, who himself admits that he may find out on Saturday night that his body isn't up to it anymore, will enter the ring with doubts over his fitness.

It's an enormous fight for Haye, more so than Bellew who has admitted that he sees his fights now as 'bonuses' rather than career-defining.

Haye definitely wants this win more - he just needs his body to let him have it.