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Poirier became the first man to knock out McGregor in his career, with his previous four losses all coming by submission.
The Diamond's leg kicks opened the door for him and he finished with it hands to make it 1-1 with the Notorious, who won their first meeting at UFC 178 in 2014.
Everything was very respectful between the two fighters on Saturday night, and before hand, which was certainly a change for McGregor.
Whilst the Notorious' behaviour recently led to respect from Poirier, his former opponents were not as kind to the Irishman.
Diaz is now the latest man to come out against the man he has traded wins with, criticising McGregor for getting stopped while also offering Poirier a fight down the road.
The Stockton Slugger hasn't been in the octagon since November 2019 when he fought Jorge Masvidal for the BMF title at UFC 244.
Technically speaking the 35-year-old did get stopped in that fight but he was still standing when the referee decided that a cut on his eye was too bad for the fighter to continue.
Diaz was understandably unhappy at the decision and he will likely consider that he hasn't been stopped since a loss to Josh Thomson in 2013, which would be his only stoppage in that case.
The youngest Diaz brother stepped in at late notice back in March 2016 to face McGregor and he became the first man to inflict a loss on the Notorious, with a submission.
Just a few months later the two men went all five rounds in an instant classic of a fight, with McGregor a slightly controversial winner on a split decision.
The former lightweight title challenger wasn't the only of McGregor's many rivals to hit out at him after the fight.
It didn't take long for Khabib Nurmagomedov to criticise the Irishman, something which didn't sit well with him considering the Russian's retirement.
Featured Image Credit: PA Images
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