| Last updated
Poirier won the trilogy series at the T-Mobile Arena but not in the manner he had hoped after McGregor broke his leg at the end of the first round and a stoppage was called.
As he stepped backwards after missing a punch, the Irishman's lower leg snapped and the contest was immediately waved off.
Poirier was winning the fight on all three judges' scorecards after the opening round.
But 'The Diamond' has been accused of deploying some illegal tactics during the fight. McGregor surprised everyone, including Poirier, when he went for a guillotine submission - this coming days after he said he only counted knockouts.
Poirier was able to defend and reverse the maneuver but some fans spotted that the Louisiana fighter had his toe in the fence of the cage to gain leverage and control.
Grabbing the cage is illegal in MMA and although referee Herb Dean didn't say anything, plenty picked up on Poirier falling foul of the rules:
Poirier accused McGregor of utilising dirty tricks and tried to make official Dean aware of what the 32-year-old was doing.
"He was putting his fingers in my glove, pulling me down to throw the upkicks," Poirier said in the post-fight presser.
"I was trying to let Herb [Dean, the referee] know that. This guy's a dirtbag, man.
"That's why I let him up. I let him up because he had three fingers in my glove. He's pulling me down into upkicks. I'm not surprised that he does that type of stuff.
"I'm telling Herb, 'I can't get out of it'. When I told Herb, maybe, Conor pulled his fingers out.
"He got what he had coming to him. Karma's not a bitch, she's a mirror, and this guy's said the wrong shit, and I've been busting my ass. Sometimes these things happens. Naw, I beat the guy."
Chosen for YouChosen for You
Most Read StoriesMost Read