UFC 148: Silva vs. Sonnen 2

At the time, this was widely considered the biggest event in UFC history, pitting the consensus greatest of all time against his most outspoken nemesis. A Middleweight Championship rematch between reigning Champion Anderson Silva and rival Chael Sonnen headlined the card, settling one of the most intense feuds the sport has ever seen. The event also marked the final UFC fights of Forrest Griffin and Tito Ortiz.