Upsets are one of the most thrilling moments in sports because fans love to see an underdog narrative where a dark horse succeeds against a heavy UFC betting favorite opponent. The UFC is not a stranger to these types of moments as we witnessed a few upsets that were forever indelibly inscribed to the fans' memory.
With Julianna Pena's recent gigantic upset over Amanda Nunes, we will be diving into unexpected finishes up to surprising winners of certain matchups that we have seen throughout the history of the UFC. Here's an all-time list of UFC's biggest upsets which defied the MMA odds.
Matt Serra Defeats Georges St-Pierre
Georges St-Pierre was supposed to cruise into an easy victory over Matt Serra in their championship meeting in 2007 at UFC 69. But Serra had other plans as he scored a first-round TKO stoppage to dethrone GSP and become the undisputed UFC Welterweight Champion. The ''Terror,'' a heavy underdog going into the match, connected a right-hand punch to St-Pierre's head which fumbled the champion.
He then followed it up with a flurry of punches that GSP couldn't answer as the referee was forced to stop the action, thus declaring Serra as the new king of the welterweights. In the rematch, though, St-Pierre made sure to reclaim his title one year later. Regardless, this 2007 win of Serra will go down as one of the biggest upsets in UFC history.