There will be no rules preventing knockouts as Floyd Mayweather returns to the ring to face American YouTuber Logan Paul early next year.
The exhibition fight, scheduled for 20 February, has drawn comparisons with the recent bout between Mike Tyson and Roy Jones Jr.
Knockouts were not permitted as the pair, both in their 50s, went on to draw after eight rounds in November.
But no such rules are in place as Mayweather faces Paul over three years after he retired from the sport with a faultless professional record of 50 wins without loss.
The founder and CEO of Fanmio, which is putting on the exhibition bout, declared Mayweather vs Paul is a “real fight” with knockouts permitted.
Solomon Engel told The Sun : “I think Floyd is going to have fun with it but he’s taking it very seriously.
“Floyd trains extensively and I don’t think he’s going to go into this fight and not be prepared. He’s very excited for the fight.
“He sees some big opportunities here, and I don’t want to speak for him but I think we all feel this could be a very historical fight and a number of different levels.”
Will Logan Paul’s huge physical advantage over Floyd Mayweather make a difference on fight night? Have your say here.
Paul lost his only professional bout to British YouTuber KSI last year, while he weighs a full four stone more and stands six inches taller than Mayweather.
Engel compared the pair to David and Goliath, adding: “This is a real fight. And whoever wins, wins. Certainly there could be a knockout, yes.
“I think it will be a very competitive fight. And to be clear, we have Floyd who is the best fighter, and Logan who is a new fighter.
“But, Logan does have some size difference, he’s many inches taller, many pounds heavier and when you look at size and how that could affect the match, there’s really no telling what the outcome could be.
“I do think that it will be competitive because Floyd has an incredible amount of skill and he’s going to bring that to the table and Logan has size.
“It’s like the David vs Goliath story – and we all know the outcome of that. But we don’t know what the outcome will be here.”