Watch moment Frank Mir made Brock Lesnar TAP OUT in shock UFC debut ahead of first pro boxing fight vs Steve Cunningham

FRANK MIR made history 13 years ago by becoming the first man to beat Brock Lesnar inside the octagon. Mir welcomed the WWE icon to the Ultimate Fighting Championship in the co-main event of UFC 81: Breaking Point. A 30-year-old Lesnar entered MMA’s premier promotion with a sole victory over Min-Soo Kim to his name. […]

FRANK MIR made history 13 years ago by becoming the first man to beat Brock Lesnar inside the octagon.

Mir welcomed the WWE icon to the Ultimate Fighting Championship in the co-main event of UFC 81: Breaking Point.

A 30-year-old Lesnar entered MMA’s premier promotion with a sole victory over Min-Soo Kim to his name.

The former NCAA Division 1 wrestler went into his contest with Mir, who had a whopping 13 fights to his name, as a huge underdog.

But the behemoth had success early doors, dropping Mir with a big straight right after eating a heavy leg kick.

Lesnar sensed blood and went in for the kill, unleashing a flurry of hammerfists in order to close the show.

Mir managed to ride out the storm by continuously looking for sweeps and eventually forced Lesnar back to his feet.

And seconds later, the Brazilian jiu-jitsu black belt bamboozled Lesnar by rolling for a kneebar.

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Frank Mir submitted Brock Lesnar with a first-round kneebar at UFC 81[/caption]

Lesnar failed to defend the crippling submission and was begrudgingly forced to tap to the former heavyweight champion.

In fact, Lesnar ended up tapping TWICE before Mir let go of the nasty lock.

Mir’s holding on to the submission after the first tap enraged Lesnar, who used it as fuel for their rematch at UFC 100 in July 2009.

And their second encounter couldn’t have been any different from their first.

Lesnar showed much improved striking and grappling skills, much to the surprise of many.

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Brock Lesnar put a beatdown on Frank Mir in the UFC 100 rematch[/caption]

The former heavyweight champ exacted his revenge in the second round by pinning Mir against the cage and unleashing hellacious blows on his face before the referee called a halt to proceedings

Mir was left a bloody mess and could barely stand after the stoppage.

And seconds later, he had to deal with a fired-up Lesnar gloating and talking trash in his face.

Two-time UFC heavyweight king Mir will be back in action this weekend, making his boxing debut on the undercard of Jake Paul’s showdown with Ben Askren.

Mir will lock horns with former IBF cruiserweight titleholder Steve Cunningham in his maiden outing to the squared circle.

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Frank Mir will take on former IBF cruiserweight champion Steve Cunningham in his boxing debut[/caption]

And he’s left no stone unturned during his transition to the sweet science.

He told SunSport: “All humans are great at bulls***ing themselves.

“Where my bulls*** came from I always knew I was smarter than any guy I fought.

“So I’d be like I know more about fighting than the guy I’m fighting, so I could be like, ‘Oh, I’ll skip this session’.

“It was an arrogance, now I’m fighting in a boxing match, now I’m not the smarter one so I have to be in better shape, do the basics, be razor-sharp and not make mistakes.”