But he vowed to continue fighting this year.
“I have to dust it off and come back and that’s it. And that’s what I will do.”
He added he was “gutted” about the loss.
“I put in a lot of work, I’m proud of my work, I would have liked to represent my team a bit better.”
“I’m here to win,” he added.
A rematch, six years later
The stunning defeat came after McGregor spent more than a year away from the UFC. He called that time a “wild ride.”
“I’m very excited to be back here,” he said during a pre-fight press conference on Thursday. “I’m very excited to have fans in here. I feel invigorated.”
“Before, when I was younger, I didn’t put a whole lot into the mental side of fighting. I listened to critics. I listened to opinions of people. I listened to Conor,” Poirier previously said. “Now, that’s just noise to me.”
CNN’s Richard Parr, Kevin Dotson and Don Riddell contributed to this report.