Two former boxing greats will turn back the clock on Saturday night, but when they step between the ropes they'll find a very different game to the one they played decades ago.
Mike Tyson and Roy Jones Jr are going head to head in an exhibition fight at the Staples Center in Los Angeles - but an exhibition is all we will have. With both men in their 50s, there is concern for their health, so the rules for this bout have been tweaked. No, this won't be a bloody, 12-round slugfest like something we'd hope to see in a Rocky film.
Andy Foster, executive director of the California State Athletic Commission, which is safeguarding the event, made that clear earlier this summer when the fight was agreed - and said he had spoken to both fighters over Zoom.
'I wanted to have their assurances that they understand. I don't care if they spar. I don't care if they work. They are world-class athletes, even still,'
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Mike Tyson and Roy Jones Jr will clash in a charity bout in Los Angeles on Saturday night
'They have a right to earn, and all these types of things. They're about the same age. We can't mislead the public as to this is some kind of real fight. They can get into it a little bit, but I don't want people to get hurt. They know the deal.'
Not get hurt? In a fight? It's hard to imagine 'The Baddest Man on the Planet' in Tyson and four-weight world champion Jones Jr not causing any damage to each other at some point, but the restrictions placed on them may very well turn this into a glorified sparring battle.
So, what are the rules for the bout? Sportsmail breaks them all down and lays out what you can expect on fight night.
But both fighters will face a series of strange restrictions ahead of the exhibition fight
Jones Jr has voiced his concerns about some rule changes as he prepares to take on Tyson
Let's start here, because it's a big one. Simply put, this has to be kept as a gentleman's affair. Knockouts are what boxing is all about - fans love to see the drama of someone being blasted to the canvas, only to clamber their way back up and offer a fightback.Insurance Loans Mortgage Attorney Credit Lawyer
'They're going to spar hard, but they shouldn't be going for a knockout,' says Foster.
'This isn't a record-book type of fight. This is not world-championship boxing right now. It's not what this is. People shouldn't be getting knocked out. The public can see what kind of shape Roy and Mike are still in.'
Over the course of their careers, these men were knockout artists - especially 'Iron Mike'. With 44 stoppages from 50 fights, he was often used as benchmark. Jones Jr, too, had an impressive knockout rate - 47 from 66 fights.
Mike Tyson has one of the most fearsome KO rates of all time, but none are allowed this time
Jones Jr also had an impressive stoppage record with 47 knockouts in 66 professional fights
But both men are no longer as fit as they once were, and there are fears that if anyone hits the deck, they could be left in a seriously bad way.
You do wonder though, if Tyson or Jones Jr open each other up and have the opportunity to go for the kill - are they really not going to take it? UFC president Dana White was left wondering the same thing this week.
'They're not allowed to knock each other out? How do you enforce that? I'd like to bet that doesn't happen. Can you bet on that?'
No ifs, no buts. If either fighter sheds blood, the contest is called off.
'They can move around and make some money, but I told them: 'If you get cut, it's over,'' said Foster.
Headguards won't be necessary, but they will be forced to use 12oz gloves - which should offer more protection than the 10oz gloves often used for professional fights.
Cuts are so common in boxing that each fighter employs a man to patch them up - and it's a crucial role that can be the difference between winning and losing. The cut-man won't be needed here, however.
The commission responsible for the bout warned it will be called off if either fighter is cut
Jones Jr (right) and Tyson will both be wearing 12oz gloves for the duration of the contest
Tyson isn't fazed by the restrictions, saying he plans to use the skills he has been honing since childhood, although he did hint that the contest could still be dangerous even without cuts or knockouts.
'We're there to show our skills, and we're fighting. This is what I