UFC 181 will have the eyes of the world watching, with a double main event on December 6th in Las Vegas. In the first main event, the UFC lightweight title will be on the line as Anthony “Showtime” Pettis defends his belt for the first time against his coaching rival on The Ultimate Fighter, former Strikeforce champion Gilbert “El Nino” Melendez. Then, UFC welterweight champion Johny “Bigg Rigg” Hendricks and veteran knockout artist “Ruthless” Robbie Lawler meet in a rematch of their epic five-round title bout at UFC 171 that is guaranteed to produce fireworks.