UFC 158: St-Pierre vs. Diaz 2013

UFC 158: St-Pierre vs. Diaz was a mixed martial arts event held by the Ultimate Fighting Championship on March 16, 2013, at the Bell Centre in Montreal, Quebec, Canada. The main event was the culmination of the rivalry between Georges St-Pierre and Nick Diaz, with the latter having been vocal in wanting to fight the current champion for nearly two years.