Top UFC lightweight contender Dustin Poirier is not convinced his ultimate nemesis Conor McGregor is one of the greatest fighters of all time.

After more than a decade of being a professional MMA fighter, UFC lightweight Dustin Poirier is certain about who the greatest fighters in the sport are in his eyes.

Unsurprisingly, Poirier's list of MMA's Mount Rushmore is not too radical. According to “The Diamond,” it is former UFC welterweight and middleweight champion Georges St-Pierre who tops the list.

“I used to be a huge fan of Georges St-Pierre,” Poirier recently told Valuetainment. “He’s one of the guys who can do it all. And back around when he was really starting to rise up, a guy was a grappler, or a guy was a wrestler, or this guy’s a kickboxer. He was one of the first guys who could really put everything together and was a complete mixed martial artist, world champion, spoke well, and I was a big fan of Georges.”

It can be recalled that Poirier hailed his UFC rival Conor McGregor, whom he had beaten twice in their dramatic trilogy, as the hardest puncher he has ever faced. However, when filling the remaining three spots in his MMA Mount Rushmore, the 32-year-old did not mention McGregor's name.

Instead, Poirier named Russian MMA icon Fedor Emelianenko, and fellow UFC mainstays Khabib Nurmagomedov and Jon Jones.

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“Khabib’s up there, Fedor [Emelianenko] is up there,” he continued. “Fedor’s gotta be up there. Jon Jones has to be up there, too.”