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UFC 254 main event breakdown: How Justin Gaethje can neutralize Khabib Nurmagomedov's grappling

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Khabib Nurmagomedov's best UFC fights (1:40)

Look back at Khabib Nurmagomedov's biggest wins inside the Octagon during his undefeated UFC career. (1:40)

Khabib Nurmagomedov is ESPN's No. 1 pound-for-pound fighter in the world. He's 28-0 and has not just defeated but also destroyed the top challengers to come his way on his journey to becoming an icon in the sport. All that said, he's in for a challenge on Fight Island. Putting it simply, he has never faced anyone like Justin Gaethje before.