The biggest flyweight fight in the world will be heading to Las Vegas on September 5th. Demetrious "Mighty Mouse" Johnson defends his UFC title for the seventh time against John "The Magician" Dodson in the main event of UFC 191. The bout is a rematch of a 2013 classic in which Johnson battled back from early knockdowns to win a razor-thin unanimous decision. Now, a little more than two years later, they will meet again to determine who is the true flyweight king. Plus, several more stars will face-off in this stacked card. Former heavyweight champions Andrei Arlovski and Frank Mir collide in a match years in the making, No. 1 light heavyweight contender Anthony "Rumble" Johnson battles British bomber Jimi Manuwa and Paige VanZant squares off against Alex Chambers.