Conor McGregor took aim at Dustin Poirier after the lightweight called for a rematch between them.
Poirier is still licking his wounds from his loss to champion Khabib Nurmagomedov last weekend. Nurmagomedov submitted the interim champion in the third round at UFC 242, but 'the Diamond' is already angling for his next big fight.
'I think me and Conor running it back makes a lot of sense at this point,' said Poirier on his Twitter, which promoted a response from McGregor.
'You should have spoke my name with a bit more respect in that build up. "McGregor's not next", motherf*****, it's McGregor always!
'McGregor is the goal! Always! Say that now and I'll think about it.'
McGregor and Poirier's first encounter in September 2014 saw the Irishman deliver another first-round knockout on his way to becoming featherweight champion.
Fight fans would love to see another fight between the two long-term rivals, but McGregor appears to has his heart set on another rematch.
McGregor called out Nurmagomedov after his latest victory, suggesting the rematch should take place in Moscow, Russia.
The Irishman has not fought since defeat to Nurmagomedov almost a year ago, but the Russian insists Tony Ferguson is next in line for a title shot.
'I want to forget the b**t with the last guy (McGregor),' Nurmagomedov said about McGregor's fight challenge.
'Me and Dustin Poirier have showed MMA is about respect, not trash-talking.
'This fight had so much respect unlike my last fight with that b**** guy.
'When you go to a gym you respect the trainer, the coaches, your team-mates and your opponents. You keep the gym clean and tidy it.'