Dustin Poirier has admitted he was wrong to publicly accuse Conor McGregor of reneging on his promise to donate $500,000.
The UFC lightweight contender revealed this week that his rival had not followed through on the offer he made before the pair's rematch in January.
McGregor insisted he planned to write a cheque but wanted to know where and how the money would be spent.
He then ramped up his rhetoric by claiming he was ready to walk away from his trilogy fight with Poirier - but this morning signed the contract for the July 10 bout.
And Poirier has now admitted he should have kept the row private, tweeting: "I am very passionate about my charity as you all know. I jumped the gun, and took private matters between Conor and my foundation public. My mistake, we live, we learn.
"Spreading positivity and doing good is my goal! I feel like I have brought a negative energy, and personal opinions into something
"I am working so hard on that gives people a reason to cheer and smile. I will take this in stride and continue to fight the Good Fight.
"New Goal coming soon, and it is a BIG one. Thank you to all who is involved and all the supporters who believe in our vision."
McGregor and Poirier will meet in front of 20,000 fans at the T-Mobile Arena in Las Vegas at UFC 264.
Reacting to the news, the Dubliner told ESPN: “I signed my bout agreement this morning. I’m going to rip this game a new a**hole July 10th. The Mac is back in Sin City! Full house!”
And Poirier added: "1-1 July 10th we will settle the score! Excited for the trilogy with Conor McGregor."
Poirier opted to face McGregor for a third time rather than challenge for the vacant lightweight title.
The 155lb strap will instead be on the line when Michael Chandler takes on Charles Oliveira on May 15.
The winners of both fights are then expected to meet later this year.
