Video Shows Conor McGregor Nearly Having A Backstage Brawl With The 'Back-Up' Fighter For UFC 264

Both men weighed in and hit the mark - as well as Rafael dos Anjos who will serve as the back-up for their lightweight showdown.

The Brazilian will slide into the Las Vegas clash should McGregor or Poirier be unable to compete.

Though he renewed hostilities with the 'Notorious' at the UFC Apex during the official weigh-in.

The latest installment of UFC Embedded shows McGregor and Dos Anjos exchanging words.

McGregor was then escorted by security while hurling abuse at Dos Anjos, calling him a 'rat' before mocking his withdrawal at UFC 196.

Prior to the incident, when the former UFC champ-champ found out that Dos Anjos was the back-up fighter, he tweeted: "Put dos anjos in at the same time."

The 36-year-old hit back: "Alcoholic hallucinosis from drinking cheap whiskey until 3:39am."

The ex-UFC lightweight king then reacted to the backstage run-in, branding McGregor a 'snake' in a damning tweet.

He wrote: "Conor you're such a snake, sneaking from behind and playing tough. Soon or later we will finish business. I'm not like the guys you play around with."

Dos Anjos may have to wait before getting his hands on McGregor, unless Poirier drops out at the last-minute.