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McGregor lost his trilogy bout to Poirier via doctor's stoppage in the main-event of UFC 264 earlier this month.
The Irishman has since claimed that he suffered an injury in the build-up and nearly pulled out of the Las Vegas showdown.
But Poirier isn't buying McGregor's 'excuses' as he pulled no punches on his assessment of the pre-fight injury talk.
"It's a win on my record. I know I did what I needed to do in the fight, pre-fight, in my training camp.
"I crossed and checked all the boxes I needed to check, gave it my all and then went out there and - like we're saying, it's noise.
"Whatever people are gonna say or he's gonna say, it is what it is."
Poirier insists his second win over the 'Notorious' is legit as he plots his next career move.
"I'm healthy, I'm safe, I'm back home, have another win on my record, and I'm still the No. 1 contender, so those are facts," he added.
The veteran American could be in line for a shot at UFC gold, with Dana White interested in booking him against 155lbs champion Charles Oliveira.
As for McGregor, he's set for a spell on the sidelines after undergoing surgery on his broken leg.
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