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Thanks to the remarkable ascent of Conor McGregor, Ireland has in quick order become a hotbed for MMA. At UFC 189 on July 11, the MGM Grand Garden Arena was packed with travelers from the Emerald Isle who made Las Vegas a suburb of Dublin for the evening. Meanwhile, UFC Fight Night “Poirier vs. Duffy” this Saturday sold out in under a minute with limited star power and two McGregor rivals facing off in the main event.