Boxing legend Mike Tyson produced one of the most terrifying knockouts in the history of combat sports.

In 1986, 'Iron Mike' took on fellow American Marvis Frazier at the Civic Center in New York.

Frazier - son of the legendary former heavyweight champion Joe Frazier - had bounced back from his loss to Larry Holmes with a six-fight winning streak from 1984 to 1986.

But he proved to be no match for Tyson who needed just 30 seconds to dispatch his opponent in ruthless fashion.

He was just 20 years old at the time.

And it looks even more brutal when replayed in super slow motion.

WATCH: Incredible slow-mo! Mike Tyson's BRUTAL knockout of Marvis Frazier

Check out the video below...

Tyson came flying out of the blocks as he barely broke a sweat.

He quickly backed Frazier into a corner before unleashing a flurry of punches with his back up against the ropes.

The then-undefeated fighter hurled himself forwards and landed a glancing blow to his opponent's jaw.

Frazier went limp for a split second as his legs started to give way before he briefly tried in vain to regain his senses.

But by then it was already too late as Tyson was not to be denied the spoils.

Mike Tyson was one of the most terrifying fighters in the history of combat sports

The slow motion footage shows the then 20-year-old throwing pretty much hell for leather before the referee mercifully steps in to stop the fight.

Frazier sagged slowly to the canvas like a sack of potatoes as the fight came to a brutal end.

And Tyson, aged 20 years and 26 days, insisted that he knew the knockout was coming.

Speaking after the fight, he said: “I was confident. I knew I was going to stop him in the first round.

“I knew from my trainer telling me that as he throws his punches he bends down.

"I knew that would be perfect for my uppercut … I knew deep down in my blood I was going to stop him in the first round.

“Soon as he comes down, boom! Look at that. What can I say, what can I say? That’s all she wrote.”

Understandably Frazier was never the same again after that as he retired two years later.

He wrapped up his career in 1988 with a decision victory over Philipp Brown, ending a respectable three-fight winning streak.

Frazier finished his career with 19 victories and just two defeats - one to Holmes and the other one to Tyson.

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