![UFC 83: Welterweight Championship - Matt Serra vs George St. Pierre | Ed Mulholland - Freelance Photographer UFC 83: Welterweight Championship - Matt Serra vs George St. Pierre | Ed Mulholland - Freelance Photographer](https://m.psecn.photoshelter.com/img-get2/I00005exgaX7Mz6A/fit=1000x750/E4L0461.jpg)
UFC 83: Welterweight Championship - Matt Serra vs George St. Pierre | Ed Mulholland - Freelance Photographer
![Flashback Fight: Was Matt Serra's KO of Georges St-Pierre biggest UFC upset in history? - MMAWeekly.com | UFC and MMA News, Results, Rumors, and Videos Flashback Fight: Was Matt Serra's KO of Georges St-Pierre biggest UFC upset in history? - MMAWeekly.com | UFC and MMA News, Results, Rumors, and Videos](https://www.mmaweekly.com/.image/t_share/MTk4NTIzNzY0Nzk0MTQwMDk5/matt-serra-ufc-69-championship-belt.jpg)
Flashback Fight: Was Matt Serra's KO of Georges St-Pierre biggest UFC upset in history? - MMAWeekly.com | UFC and MMA News, Results, Rumors, and Videos
![The Ultimate Underdog: Why Matt Serra beating Georges St-Pierre is still MMA's greatest upset - MMA Fighting The Ultimate Underdog: Why Matt Serra beating Georges St-Pierre is still MMA's greatest upset - MMA Fighting](https://cdn.vox-cdn.com/thumbor/OWDVmhKMCmgq1rXXT96sTfHvGoQ=/1400x1050/filters:format(jpeg)/cdn.vox-cdn.com/assets/2683101/008_Frank_Trigg_vs_Matt_Serra.jpg)
The Ultimate Underdog: Why Matt Serra beating Georges St-Pierre is still MMA's greatest upset - MMA Fighting
![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
![Road to Toronto: Georges St. Pierre brutalizes Matt Serra to reclaim the welterweight title - MMAmania.com Road to Toronto: Georges St. Pierre brutalizes Matt Serra to reclaim the welterweight title - MMAmania.com](http://cdn2.sbnation.com/imported_assets/709124/mma_stpierre_punch_580.jpg)