UFC Hall of Famer Khabib Nurmagomedov knows a thing or two about last-minute opponent changes. Nurmagomedov, one of the best former lightweight champions in the sport, has become an incredible coach. At UFC 311 , he will be in the corner of Islam Makhachev , who will no longer defend his title against Arman Tsarukyan but instead, Renato Moicano . The news of the shift came Friday morning after official weigh-ins for the event.