It was the UFC 's first event in Canada and was held at the Bell Centre in Montreal , Quebec .
At UFC 83 on April 19 , 2008 , St - Pierre fought Matt Serra in a rematch to determine the undisputed UFC welterweight champion .
UFC was the UFC 's first event in Canada and was held at the Bell Centre in Montreal , Quebec .
At UFC 83 on April 19 , 2008 , St - Pierre fought Matt Serra in a rematch to determine the undisputed UFC welterweight champion .