McGregor, who’s angling for a fight this summer and command of the UFC spotlight he used to own, took to Twitter on Monday to trash Gaethje and claim he was up next against the 31-year-old.”Its me and Justin next as khabib is the biggest bottle fighter in the game. Guarantee it,” McGregor wrote in a tweet.”I am going to f—ing butcher you,” McGregor wrote in another message, addressed to Gaethje. “Your teeth. I’m going to put them on a f—ing necklace. Speak on my skills as a father? You are f—ing dead.”MORE: NBA could struggle to follow UFC’s lead Conor McGregor witnessed the dominant effort by Justin Gaethje at UFC 249 against Tony Ferguson this past weekend from home, steaming over the praise Gaethje received for a fifth-round TKO.Gaethje, of course, stepped into the fight because McGregor’s top rival, Khabib Nurmagomedov, was stuck in Russia amid the coronavirus pandemic. Gaethje’s surprise win sets him up for a showdown against Nurmagomedov for the lightweight title. McGregor, 31, has lost two of his past five fights and competed just once since October 2018.He’s faced two sexual assault allegations in the past year and punched a man at a bar in Dublin, Ireland.Gaethje is managed by Ali Abdelaziz, the same person who manages Nurmagomedov. Abdelaziz told ESPN this week that McGregor would not leapfrog his clients for a title opportunity.