Justin Gaethje has stuck the knife in after Conor McGregor’s humbling defeat by Dustin Poirier. The former two-weight champ suffered a shock second-round TKO in the UFC 257 main event in Abu Dhabi last Sunday, which saw him slip to No 6 in the lightweight rankings, while “The Diamond” leapfrogged Gaethje back to the top of the heap. McGregor’s coach John Kavanagh said in an interview with ESPN’s Ariel Helwani that the Irishman is already lobbying the UFC for a trilogy rubber match against Poirier for the vacant title in May – which was met by short shrift from former interim champ Gaethje. “They’re idiots,” Gaethje said of McGregor and Kavanagh to ESPN’s Brett Okamoto. “He’s been treated special over and over and over, and he didn’t capitalise on this opportunity. “That event was for him to win and he wants to be ‘Mr Humble’ now, but you know he would’ve been a [expletive] if he won that fight. “So I don’t feel bad for him. I’m happy for Poirier that he went out there and did his job. I’m happy to see a loudmouth kid get knocked out. There’s nothing that makes me happier. UFC signs China academy graduates ‘Dragon Girl’, ‘Mongolian Murderer’ “Seeing a piece of [expletive] get put down, that was great, I loved it. If he fights for a title, I will never fight in the UFC again. That would be preposterous. “For one, he’s sitting at No 6. He’s won one fight in his entire life in the lightweight division, and he picks and chooses who he fights. So I have no respect for him in that matter.” For what it’s worth, “The Notorious” is unlikely to be ready to fight until late summer, after being handed a six-month medical suspension by doctors following Poirier’s devastating leg kicks that set up victory on Fight Island. “He’s already looking for the next date which we hope to get sooner rather than later,” Kavanagh told Helwani this week. “He was pressing for a busy 2020 and nothing’s changed. He wants a busy 2021 so I hope we can get the rematch. That would be the ideal. “He’s already harassing everybody,” Kavanagh added. “I don’t think Dustin is against that. If we could get the rematch before the summer, that would be amazing. “If it’s not that, then I’m not sure what it would be – whether it’s a different MMA fight or a boxing fight – I’m not too sure of that. “Maybe he drifts off into the boxing side so if the MMA community can help me out and get behind me and pester the UFC to give him another fight sooner rather than later so I don’t lose him for six months to boxing, I’d appreciate that.”