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The pair had squared off back in 2014 at UFC 178 and after butting heads in the build-up, McGregor knocked Poirier out after 1 minute and 46 seconds of the first round.
There was a mutual respect for their rematch, however - with the pair extremely complimentary of one another and McGregor even pledging a $500,000 donation to Poirier's charity 'The Good Fight Foundation'.
McGregor was making his long-awaited return to UFC following on from his explosive first round decimation of Donald 'Cowboy' Cerrone at UFC 246 in January 2020.
'The Notorious' fighter hoped for more activity in the year just gone but after he and UFC chiefs couldn't come to an agreement, he elected to return to the exciting lightweight division and do battle with former foe Poirier again in the promotion's first pay-per-view of 2021.
Feeling in the best shape of his career at 155lbs, 'Mystic Mac' had promised "a masterpiece" and predicted he would stop 'The Diamond' inside 60 seconds at the Etihad Arena.
But the fight played out very differently as Poirier levelled matters in the series with a second round TKO to give him the biggest win of his career and inflict McGregor's third loss in UFC.
DUSTIN POIRIER HAS KNOCKED OUT CONOR MCGREGOR!
:gem: @DustinPoirier HAS DONE IT! #UFC257
:island:️ #InAbuDhabi ' @VisitAbuDhabi pic.twitter.com/MWap7b9oNE
- UFC Europe (@UFCEurope) January 24, 2021
As per Forbes, McGregor is expected to pocket a $5 million from his fight purse, but pay-per-view earnings should see him collect another $20 million in his first UFC fight for just over a year.
Without even taking his cut of pay-per-view revenue into account, Poirier is said to be taking home a handsome $1 million - giving him the biggest pay-day of his career after a monumental victory.
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