UFC 131

UFC 131: Lesnar vs. Dos Santos was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on June 11, 2011, at Rogers Arena in Vancouver, British Columbia, Canada. The event was initially headlined by a heavyweight bout between Brock Lesnar and Junior dos Santos, which was intended to determine the next challenger for the UFC Heavyweight Championship. However, Lesnar was forced to withdraw from the fight due to a recurrence of diverticulitis.

Shane Carwin stepped in as a replacement to face Junior dos Santos. The co-main event featured a featherweight bout between Kenny Florian and Diego Nunes. The card also included notable fighters such as Mark Muñoz, Demian Maia, Sam Stout, and Donald Cerrone.

Junior dos Santos defeated Shane Carwin by unanimous decision in the revised main event, earning him a shot at the UFC Heavyweight Championship against Cain Velasquez. Kenny Florian defeated Diego Nunes by unanimous decision. Other notable results included Mark Muñoz defeating Demian Maia by unanimous decision and Donald Cerrone defeating Vagner Rocha by unanimous decision.

The event drew a reported attendance of 14,657 and generated a live gate of $2.8 million. The pay-per-view buyrate was estimated to be around 270,000 buys. The event was broadcast live on pay-per-view in the United States and Canada.