‘It’s been nothing but mixed martial arts’ — McGregor talks training camp for UFC 264 Share this story Related McGregor, who treated the Poirier rematch as a warm-up for a boxing showdown with Manny Pacquiao, revealed during a recent Instagram Live session that he has been taking the trilogy very seriously. ‘The Notorious’ got the ball rolling by reading a comment from none other than Justin Bieber who, judging by the Instagram Live session, is a huge fan of the Irishman. “Justin I love you bro, I’ll tell you I appreciate that message from the last fight,” McGregor said (h/t Ryan Harkness of MMA Mania). “That meant a hell of a lot to me, it really, truly did.”