UFC boss Dana White has released video footage of the sparring session that's been the talk of the combat world for weeks.
Paulie Malignaggi sensationally stormed out of McGregor's camp last week after images of his sparring with the UFC star were posted online.
Malignaggi labelled McGregor 'one of the biggest dirtbags' he'd ever met, claiming the images were misleading and didn't paint the full picture of the Irishman's below-par boxing skills.
Malignaggi demanded McGregor's camp release video of the session, and UFC boss White has now answered the request.
White on Saturday posted two clips from the sparring session, one of which shows the controversial 'knockdown' that caused all the anger.
Malignaggi was fuming that McGregor's camp labelled the moment a 'knockdown', claiming it wasn't aything more than a stumble and shove from McGregor.
While White's videos do appear to support Malignaggi's claims, they also show McGregor completely dominating his opponent and landing a number of big shots.
Malignaggi also claimed McGregor "whimpers like a girl" when he is hit by body shots.
"This guy is one of the biggest dirtbags I've ever met in my life - bar none," Malignaggi told MMA Hour.
"I was amazed at what a dirtbag this person is. I don't care if we never speak again. My life is fine if I never see Conor McGregor again.
"I was dumbfounded by the way things were. It's just about status with him. It makes me doubt if he ever really went through a tough time in his life like they try to say he did. If somebody went through that tough a time in life just a few years ago, they wouldn't treat people who were not as fortunate as him that bad."
Malignaggi also claims McGregor is scared of being challenged in the ring, something Mayweather is likely to exploit.
"He doesn't want to be put in those positions. He wants to be the front runner," Malignaggi added.
"He wants to be the guy who always has the advantage, because when he has an advantage he's a big man. When he gets tired, he wants out of a fight."