Win or learn? Nate Diaz is having none of it.
While talk of a highly-anticipated third fight between the pair bubbles away in the background, 32-year-old Diaz made his feelings known in response to an image McGregor uploaded to Instagram.
While many remained in awe of the Irishman after his effort to last 10 rounds against one of the greatest fighters the world has ever seen, Diaz had nothing but scorn.
The American who defeated McGregor in 2016, took aim at his rivals 'overpromotion' and said there was 'no learning'.
Diaz finished his message by saying "Bruce Lee would've never lost like that".
There is genuine hatred between Diaz and McGregor, making their potential all the more enticing with the results currently split at one-a-piece in the Octagon.
However it could be a hard fight to arrange for UFC president Dana White, after Diaz recently demanded 'at least $20 million' for the fight.
"At least $20 million, $30 million. Come on," Diaz told Submission Radio.
"UFC’s making a whole lot of money, a whole lot of money and they’re pocketing it.
"They’re giving more to McGregor, so it’s not fair because it takes two in that ring to draw a crowd.
"It’s the fighters that draw the crowd, and Nathan and McGregor, third one would be outstanding. Everyone knows that."
McGregor has also spoken publicly about another rematch with Diaz, stating his heavier fighter would have to come down to 155 pounds for the fight.
"I’m the 155-pound champion, I faced him at 170, he beat me, then I rematched him at 170, I beat him," McGregor told BBC News.
"Now I’m the 155-pound world champion. If he wants that fight, he must come down. That’s a fair trade.
"I didn’t ask for the rematch at a lower weight, I asked for the rematch at the exact same weight. I thought that was a fair-play move on my half and then I came in and I won.
"So now I won that, then I won the 155-pound title after that. If he wants to fight, he’s got to make that 155-pound limit.”