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The pair face each other on Saturday, as they headline UFC 257 and Poirier gets a shot at revenge. Their 2014 fight ended in a first-round TKO for McGregor - but 'The Diamond' ensured that McGregor left the Octagon one tooth down.
Just 30 seconds before McGregor brutally knocked him out, Poirier and Conor exchanged left hooks - and the American's shot dislodged one of McGregor's lower teeth, cracking it in two.
After his victory, McGregor can be seen inspecting the damage by opening his mouth and looking up at himself on the big screen at the MGM Grand Garden Arena in Las Vegas,.
The thrill of his triumph is probably being tempered slightly by the fact that 'The Notorious' knows he has a one-on-one with the dentist as his next opponent.
The original fight took place at featherweight, while the rematch takes place at lightweight in Abu Dhabi. Recently retired world champion Khabib Nurmagomedov - who holds a win over both men - will be in attendance watching live.
Rumours persists that Khabib has told Dana White that he might consider reversing his retirement decision if something spectacular occurs in the Octagon on Saturday.
And there's no doubt that UFC president White would secretly love seeing another McGregor win over Poirier so he could plot a money-spinning rematch between Conor and Khabib.
Dana White if Dustin Poirier beats Conor McGregor on Saturday: pic.twitter.com/pGYDSPcllh- Out Of Context MMA (@oocmma) January 18, 2021
However while their original contest lasted less than two minutes and ended conclusively for McGregor, Poirier proved that he could hit - and hurt - 'The Notorious' with his own fistic firepower.
Will Poirier land the punches that can actually take out McGregor - as opposed to just one tooth - this weekend? Let us know in the comments.
Featured image credit: UFC
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