UFC 196: McGregor vs. Diaz

The event was headlined by reigning Featherweight Champion Conor McGregor facing Nate Diaz, after McGregor’s scheduled Lightweight Championship fight against Rafael dos Anjos was cancelled. Both fighters agreed to compete at welterweight on short notice. After a slugfest in the first round, Diaz submitted McGregor in the second, handing him his first UFC loss and igniting one of the most commercially significant rivalries in UFC history.