At UFC International Fight Week in Las Vegas, UFC 189 showcases two anticipated championship bouts featuring four global superstars. In the main event, the United States' Chad "Money" Mendes gets his shot at championship gold when he faces Ireland's Conor McGregor for the interim UFC featherweight title. McGregor has knocked out Diego Brandao, Dustin Poirier and Dennis Siver in succession, but he will matched by former All-American wrestler Mendes, who has ended five of his past six wins by knockout. In the co-main event, the United States' Robbie Lawler defends his UFC welterweight belt against Canada's Rory MacDonald in a rematch of a 2013 bout won by Lawler. On July 11th, MacDonald gets his shot at redemption with more than ever on the line.