After a profanity-laced tweet directed towards the UFC, McGregor and a group of supporters arrived at Barclays Center in NY to interrupt the UFC 223 press conference and began attacking the bus.
The Irishman was relieved of the crown because of his hiatus from the octagon, having made a brief foray into boxing to challenge Floyd Mayweather in a highly lucrative contest in August past year.
UFC 229 takes place Saturday at T-Mobile Arena in Las Vegas.
Bookmakers have installed Nurmagomedov as favourite to retain his UFC crown, pointing to the Russian's formidable record. Nurmagomedov's game clicking into its career-best form only makes a fight this big all the more exciting.
And, at the last press conference a few weeks ago, Conor called Khabib a "little rat, little weasel".
But the drumbeat for a showdown between the outspoken former plumber from Dublin and Nurmagomedov intensified earlier this year when McGregor was at the centre of a extraordinary melee in NY in April. Then, [Friday], we are going to have these two face off at the weigh-ins and on Saturday they are going to fight.
The former champion was later given five days community service and ordered to undergo treatment for anger management.
Conor McGregor and his rival Khabib Nurmagomedov had recently addressed the media together for the first time before UFC 229 in Radio City Music Hall, New York. Two of the best strikers in this sport: me and McGregor. "And that's it", McGregor said. "Dig my knuckle into his orbital bone and that's what I'm going to do". "On Saturday night you're in for a show, trust me on that".
After 15 minutes of answering questions while the crowd attempted to drown him out, the native of Russian Federation delivered on his threats to leave when McGregor never showed.
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"For me, this is more than just defending my title".
"He killed your people". Now you support (his grandson)? I'm gonna to aim right between that man's eyes and this is never over.
"Three p.m., this press conference is beginning", Nurmagomedov said.
White, the UFC's brash president, deserves equal blame for not policing his star fighter consistent with others in his company.
White hinted that UFC 229 could eclipse two million pay-per-view buys, which would put the card in special company. "(Khabib) showed up and said what he had to say". It has been sold as "the biggest event in UFC history" and it will be tough to argue with that statement.
"I have been grappling and wrestling much bigger fighters for months straight", McGregor said.
"He's hit the big-time now and his fans are totally into it". "Khabib's audience is eating it all up".
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