![MMA History Today on X: "Many believed that St-Pierre would hold the Welterweight title for a long time. Matt Serra stopped that conversation immediately. GSP climbed the ranks & earned a rematch MMA History Today on X: "Many believed that St-Pierre would hold the Welterweight title for a long time. Matt Serra stopped that conversation immediately. GSP climbed the ranks & earned a rematch](https://pbs.twimg.com/media/D4jqkIUWwAAfaHc.jpg)
MMA History Today on X: "Many believed that St-Pierre would hold the Welterweight title for a long time. Matt Serra stopped that conversation immediately. GSP climbed the ranks & earned a rematch
![Road to Toronto: Matt Serra knocks out Georges St. Pierre in the upset of the century - MMAmania.com Road to Toronto: Matt Serra knocks out Georges St. Pierre in the upset of the century - MMAmania.com](http://cdn1.sbnation.com/imported_assets/707759/d72613f4-1422-0e8c-9ae7b028b4cba836.jpg)
Road to Toronto: Matt Serra knocks out Georges St. Pierre in the upset of the century - MMAmania.com
On This Day: GSP vs Matt Serra | #OnThisDay in 2007: Was this the BIGGEST upset in UFC history?! Matt Serra knocked out GSP! 😳 | By UFC | Facebook
![Arguably THE greatest Upset in MMA history. When Matt Serra slayed Prime GSP to become the UFC Welterweight Champion of The World at UFC 69. : r/MMA Arguably THE greatest Upset in MMA history. When Matt Serra slayed Prime GSP to become the UFC Welterweight Champion of The World at UFC 69. : r/MMA](https://external-preview.redd.it/fWY5zZniSWb7hQBfxOQERaR59tEExjuubAFxgRVadNU.jpg?width=640&crop=smart&auto=webp&s=50d9344c650910b4270e48734c9c2e815ac0c02a)