McGregor has won just one fight in 10 years, but repeatedly claimed he would “destroy” Holloway, who is also a former UFC featherweight champion.
Holloway, 34, regarded as one of the best UFC fighters of all time, engaged occasionally with McGregor but spent the majority of the interactions smiling to himself and shaking his head in amusement.
“He’s got two belts, I can’t wait to take those two pretty belts off his hands,” said Holloway.
“He’s doing all the right things, he’s found God, got his family right here, I can’t wait guys.”
In 2021, McGregor was the highest paid athlete in the world, earning just under £128m over 12 months, but he says he is returning to action “for the love of the game”.
“Honey I’m home. I put a bed in the gym, I lived in the gym literally,” said McGregor.
“No travel, no traffic, with a lot of young, hungry lions around me angling to be in my position.
“So it’s been a tremendous experience, a tremendous camp, here we go. Glory to God.”