McGregor suffered a gruesome leg break in the closing seconds of the first round on Saturday night with Poirier getting the win via doctor’s stoppage.
It handed Poirier his second straight win in his series against the Dubliner having lost their first fight back in 2014.
Former lightweight champion Nurmagomedov, who holds a win over both men, was an interested observer and was quick to praise Poirier – while also aiming a dig at old foe McGregor.
The Dagestan fighter wrote on Twitter: ‘Good always defeats evil. Very happy for @DustinPoirier I hope you will get the belt end of the year.’
Poirier is now in line for a title shot against current lightweight champion Charles Oliveira – with a fourth fight with McGregor likely once the 32-year-old recovers from what Dana White confirmed to be a fractured lower tibia.
‘It sucks, it’s brutal and it’s not the way you want to see fights end,’ White said.
‘Dustin Poirier will fight for the title and when Conor is healed and ready to go, we’ll do the rematch.’
Stricken on the mat following the shock conclusion to the bout, McGregor insisted his series with Poirier is not over.
‘I was boxing the bleeding head off him and kicking the bleeding leg off him – the usual s***e to close this distance,” McGregor said.
‘This is not over. If I have to take this outside with him, I’ll go outside. I don’t give a b******s.’
MORE : Dustin Poirier’s wife Jolie issues defiant response to Conor McGregor following DM taunts
MORE : Dana White reveals Conor McGregor will get Dustin Poirier rematch after leg break at UFC 264
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