MIKE TYSON hit the gym ahead of his fight with Jake Paul and fired a threatening warning at his rival.
The 58-year-old heavyweight legend faces the YouTuber-turned-boxer on November 15.
Tyson is training hard in preparation for the professionally-sanctioned bout and shared a video of himself working out.
Iron Mike showed off his muscles while performing gruelling neck exercises to prove he is ready to take any punches.
And he also had time to fire a warning at the opponent 31 years his junior, captioning the clip: "While Jake keeps talking, I’m going to keep training. Going to f*** him up."
Fans were impressed by his physique, with one saying: "Call off the fight, champ. You’ve already won."
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Another added: "Young men fight. Old men kill."
A third reacted: "The neck looks crazy. Like old Mike."
Despite the fight going on both their pro records, the rules have been modified after Tyson supposedly requested shorter, two-minute rounds and bigger 14oz gloves to be allowed.
Paul hit back after agreeing to the changes, telling The Daily Mail: "He's like, 'Watch your shape, watch your shape'. I'm like, 'Alright, but you watch it'.
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"It could be to his advantage. I think it is also smart that he is doing that. I'm fighting on all of his rules and what he wanted.
"He wanted it to be a pro fight. He wanted eight, two-minute rounds. So I'm giving him everything he wants.
"I'm going to his playground, and I'm going to beat his a**. I mean, it's just being alert and knowing what to do in that situation."
The fight will take place at the 80,000-seater AT&T Stadium in Texas, with Netflix broadcasting the bout.
Jake Paul vs Mike Tyson’s lifestyles compared
ONE is a notorious YouTuber-turned-boxer who has taken the sport by storm.
The other terrorised all in the ring in the 1980s and 1990s, famously biting the ear off an opponent in one fight.
Iron Mike has rebuilt his life after squandering a £300m fortune with a cannabis empire, and is a huge advocate of the drug.
And as Paul has continued to rise up the ranks, he has splashed the cash on a fleet of amazing cars.
Whereas Tyson had more money than sense until a £15m debt saw him part with his cherished car collection.
Paul now lives in a plush mansion worth £13m in Puerto Rico, after escaping his hectic life in LA.
But these days, Tyson lounges in his Vegas property he paid £2.5m for with wife Lakiha, who he married in 2009.
Paul is not yet married but is smitten with his speed skater girlfriend Jutta Leerdam.
She will be by his side when her man puts his 9-1 boxing record on the line against two-time heavyweight champ Tyson on July 20.