Jake Paul has set off alarm bells with his training footage ahead of his controversial fight with Mike Tyson next month.
All eyes will be on the pair when they lock horns on November 15, with millions of viewers around the world expected to tune in.
Paul will be aiming to continue his impressive start to his boxing career, having won 10 of his 11 bouts so far.
But he'll be facing an icon of the sport in Tyson who, despite being 58, remains as powerful and deadly as ever.
Boxing news: Fans are worried about Jake Paul as his showdown with Mike Tyson rapidly approaches
Paul recently shared footage of him training in the gym to his Instagram page as the American looks to come out on top.
But boxing fans on the social media site have been left far from impressed, with many criticising his performance.
"Jake Paul gone get slept fighting like that," were the words of one user.
A second said: "Bros hella uncoordinated."
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A third stuck the knife into Paul by saying: "Dude has nothing to do with boxing, he moves like a starter at a street fight."
Another brutally said: "7 year olds box better than him."
And a fifth fan wrote: "Amateur af."
Paul is unlikely to be too fazed by their comments but the 27-year-old will need to operate at the peak of his powers to win the fight next month.
Many have been quick to write off Tyson, suggesting he's simply too old.
But the boxing icon is one of the best heavyweights in the sport's entire history and, consequently, can't be written off.
MMA manager Ali Abdelaziz, meanwhile, has opened up on the upcoming clash.
And he feels that the only people capable of stopping Tyson's highly-anticipated return to the ring is the boxing icon's family.
"Listen, as far as I know, his training camp is going good," he said.
"He's feeling amazing. I would like Mike Tyson to put a hole in his head.
"But, in a way, who are we to tell Mike Tyson not fight? I think Mike Tyson, win, or lose, or draw, [he is] one of the most recognisable figures in the sports history.
"Anywhere, in Africa, in Asia, America, everywhere.
Boxing news: Mike Tyson and Jake Paul will finally do battle on November 15
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"I think nobody has the place, but his family, to tell him to fight or not to fight. This is my opinion."
Tyson's last fight was an exhibition clash with Roy Jones Jr in 2020, with that bout ending in a draw.
As for Paul, he easily dispatched Mike Perry during their showdown back in July.