UFC 83: Serra vs. St-Pierre 2

A Welterweight Championship rematch between Georges St-Pierre and Matt Serra headlined the card, after Serra shocked the sport by knocking out GSP in their first meeting, widely considered the biggest upset in UFC history. Serra entered hostile territory, defending the title in GSP’s hometown of Montreal. This event marked the first UFC event ever held in Canada, a long-anticipated debut in a country Dana White had long described as the mecca of MMA.