Conor McGregor Loses Fight Against Dustin Poirier After Suffering Leg Injury During First Round

Jeff Bottari/Zuffa LLC/Getty Conor McGregor and Du

Conor McGregor has racked up another loss to Dustin Poirier.

During the first round of Saturday night's highly-anticipated UFC 264 fight, the Irish MMA pro, 32, injured his leg, leaving him unable to get off the mat before time expired, according to ESPN. After the fight, UFC President Dana White said that McGregor had injured the lower tibia in his left shin.

Poirier, 32, won by TKO and McGregor was transported out of the arena on a stretcher.

"It sucks. It's brutal. It's not the way you want to see fights end," White said while speaking to reporters at a press conference, adding that McGregor would go into surgery on Sunday.

"His ankle snapped from throwing punches. He was fighting back," White added. "It wasn't like he was up against the cage defenseless...if his ankle doesn't break, I think we get to the end of the round."

White added that another rematch between the pair is likely.

"The fight didn't get finished. You can't have a fight finish that way. We'll see how this whole thing plays out," he said. "Who knows how long Connor's out. Poirier will do his thing until Connor's ready."

Jeff Bottari/Zuffa LLC/Getty Conor McGregor and Dustin Poirier

As for the cause of his injury, Poirier said that he hurt McGregor's ankle on a checked kick, although the Irish fighter denied this, ESPN reported.

"He fractured it on one of the checks at the beginning of the fight, then it broke on a punch, for sure," Poirier said during his post-game interview. "I pointed at him at the beginning of the fight, that's when I checked a kick, that's when it cracked. It was probably cracked and then something twisted with the punch."

RELATED: Conor McGregor Says He's 'Elevating' His Leg and Spirit After Knockout Loss to Dustin Poirier

Both fighters are also determined to face each other once again.

"This is not over!" McGregor said after the match, while Poirer remarked, "we are going to fight again."

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Back in January, McGregor suffered a second-round knockout loss to Poirier at UFC 257.

Following his defeat, the fighter shared a post on Instagram, saying he was looking forward to redemption in a future match. "Thanks for the support everyone! Was not my night/morning in there but a great contest to improve on. I'm excited at the blockbuster trilogy I now have on my hands," he wrote. "Dustin is a hell of a competitor and I look forward to going again."

They also faced off in 2014, with McGregor knocking out Poirier in under two minutes.