The vacant UFC light heavyweight championship is up for grabs as feared knockout artist Anthony "Rumble" Johnson squares off against two-time U.S. Olympian Daniel Cormier in an intriguing clash of top contenders.

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.