Champions collide as Khabib Nurmagomedov faces off against the human highlight, Justin Gaethje. Plus, former middleweight champ Robert Whittaker readies himself for top five knockout artist Jared Cannonier. Go behind the scenes of UFC 254. SPECIAL START TIME of 2pm ET / 11at PT! Order UFC 254 now: bit.ly/2vNIBE8 (U.S. only)

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