|UFC 83: Serra vs. St-Pierre 2|
|Promotion||Ultimate Fighting Championship|
|Date||April 19, 2008|
|City||Montreal, Quebec, Canada|
The event on this date was originally scheduled to be called UFC 84, but following the cancellation of a tentatively scheduled March 8, 2008 event in England, the event's title was changed to UFC 83 instead.
The card was headlined by UFC Welterweight Champion Matt Serra and UFC Interim Welterweight Champion Georges St-Pierre in a match to unify the championship. It was a rematch from their fight at UFC 69, which Serra had won. The two fighters exchanged harsh words through the media following that fight, which led to the circumstances that surrounded the rematch. St-Pierre cited personal issues for the loss. He said that his father was seriously ill, and that his 17-year-old cousin had died in a car accident around the time of the first fight. St-Pierre then claimed that he only accepted the fight with Serra because he thought he could "easily beat this guy." Serra took exception to these comments and responded in a subsequent radio interview by calling St-Pierre a "Frenchy", telling him to "go drink some red wine and go watch a hockey game." 
This event was the company's first event in Canada. Several prominent Canadian MMA fighters competed on this card, including Kalib Starnes, Mark Bocek, Jason MacDonald, Sam Stout, and Jonathan Goulet. Patrick Côté was originally scheduled to fight on this card as well against Alan Belcher, but was forced to pull out after sustaining a non-fighting related injury and replaced by Jason Day.
At the time, UFC 83 officially broke two UFC records. The first record broken was the fastest sellout ever. The UFC sold most of the tickets to UFC Fight Club members in the first 24 hours of the fightclub presale. The rest of the tickets were sold within one minute of the public sale. The second record broken was the UFC attendance record. The 21,390 people who packed the Bell Centre officially broke the former attendance record of 19,049 set at UFC 68 in Columbus, Ohio back in March 2007.
|Main card (PPV)|
|Welterweight||Georges St-Pierre (ic)||def.||Matt Serra (c)||TKO (knees to the body)||2||4:45||[a]|
|Middleweight||Rich Franklin||def.||Travis Lutter||TKO (punches)||2||3:01|
|Middleweight||Nate Quarry||def.||Kalib Starnes||Decision (unanimous) (30–26, 30–27, 30–24)||3||5:00|
|Middleweight||Michael Bisping||def.||Charles McCarthy||TKO (arm injury)||1||5:00|
|Lightweight||Mac Danzig||def.||Mark Bocek||Submission (rear-naked choke)||3||3:48|
|Middleweight||Jason Day||def.||Alan Belcher||TKO (punches)||1||3:58|
|Middleweight||Jason MacDonald||def.||Joe Doerksen||TKO (elbows)||2||0:56|
|Middleweight||Demian Maia||def.||Ed Herman||Technical Submission (mounted triangle choke)||2||2:27|
|Lightweight||Rich Clementi||def.||Sam Stout||Decision (split) (29–27, 28–29, 29–28)||3||5:00|
|Heavyweight||Cain Velasquez||def.||Brad Morris||TKO (punches)||1||2:10|
|Welterweight||Jonathan Goulet||def.||Kuniyoshi Hironaka||TKO (punches)||2||2:07|
- Unification of the UFC Welterweight & UFC Interim Welterweight championships.
At the end of this event, $75,000 was awarded to each of the fighters who received one of these three awards.
- Fight of the Night: Jonathan Goulet vs. Kuniyoshi Hironaka
- Knockout of the Night: Jason MacDonald
- Submission of the Night: Demian Maia
The Quebec Boxing Council refused to disclose payout details, as is not uncommon for non-US held pay-per-view events.
- Stupp, Dann (January 13, 2008). "MMA Executive: Jason MacDonald vs. Joe Doerksen at UFC 84". MMAJunkie.com. Retrieved 2008-01-15.
- Stupp, Dann (January 29, 2008). "Houston Alexander vs. James Irvin, Clay Guida vs. Samy Schiavo Added to UFC Fight Night 13". MMAJunkie.com. Retrieved 2008-01-31.
- Stupp, Dann (January 4, 2008). "Matt Serra Is Willing to Fight Georges St-Pierre in Canada". MMAJunkie.com. Retrieved 2008-01-31.
- "Report: Jason Day in, Patrick Cote out at UFC 83". mmajunkie.com. February 11, 2008. Retrieved 2014-11-21.
- Stupp, Dan (February 8, 2008). "UFC 83 Creates Record Sellout". MMAjunkie.com. Retrieved February 22, 2009.
- Stupp, Dann (April 20, 2008). "Goulet, Hironaka, MacDonald and Maia earn UFC 83 bonuses". mmajunkie.com. Retrieved 2008-04-30.