Boxing star Deontay Wilder has raised fears Mike Tyson could end up in a coma when he fights Jake Paul later this year.
Tyson, 57, is coming out of retirement to face 27-year-old Paul at the AT&T Stadium in Texas on July 20.
While the boxing icon was formidable during his prime, however, many are unsure how he'll fare facing an opponent 30 years his junior.
Tyson has been updating fans by sharing footage of himself hitting the pads in training, demonstrating his remarkable power in the process.
Mike Tyson will be facing an opponent 30 years younger than him when he goes up against Jake Paul in July
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Yet Wilder is worried for the 57-year-old and has raised fears that Tyson could end up in a coma.
He told Sportsbook Review: "I think it's bad the commission has licensed Mike Tyson because he hasn't been active in 20 years, so they should not just licence him because of who he is, that's how people get hurt, god forbid he gets hurt.
"People can get hit in the wrong place and at the wrong time, there's lots of examples where guys have been hit into a coma.
"It's easy to do. He's too old for this.
"At the end of the day, no one gives a f**k about Mike.
"We can talk about the pros and cons, but at the end of the day, they don't give a f**k.
"I don't think anyone cares about Mike because if they did they wouldn't sanction the fight.
"They may say they've done tests and all that, ok, but as long as you're willing to suffer the consequences if something bad goes wrong.
"His power may not have left completely but you still need to set it up, your stamina needs to be a certain way, or it's going to look like a clown show.
"I don't want to see it to be honest.
"I don't want to see one of my legends fight a YouTuber.
"If he goes in there and he knocks Mike out, that's going to tarnish the reputation of Mike.
"I don't want the last thing I remember of him is him getting knocked out by a YouTuber.
"The last thing you do, that's what people remember you by."
Meanwhile, Tyson vs Paul isn't the only big fight on the horizon.
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Deontay Wilder fears Mike Tyson could end up in a coma when he battles Jake Paul
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Tyson Fury and Oleksandr Usyk are set to finally meet next weekend after months of delays.
Wilder knows all about Fury, having faced the Briton three times during the course of his career.
Yet the American has admitted it's tough to predict how the battle between Fury and Usyk will play out.
"I really don't know, I'm on the fence," he admitted.
"I honestly do not know because although Usyk is smaller, he will manoeuvre around.
Mike Tyson and Jake Paul's upcoming fight is set to be watched by millions across the world
"Usyk still has the power and speed to do certain things.
"You can't count Usyk out just because Fury's so tall.
"I hope they handle business, put in a great show and leave the ring with good health. I have no dog in the fight."