Sébastien Demers (born 24 December 1979) is a Canadian former professional boxer who competed from 2004 to 2013 and challenged for the International Boxing Federation middleweight title in 2007.
Demers is a former Canadian and IBF International middleweight title champion.
Demers had just been beaten for the first time in his career after facing Arthur Abraham for the IBF middleweight title in Germany.
Demers won a clear points verdict, however, the decision was met with a chorus of boos with commentators stating that the fight was much closer than the score cards suggested with Demers just nicking many of the rounds.
He also lost to James Degale in May 17, 2013 at Quebec, Canada.< In April 5, 2008, in a middleweight category, he defeated Matt Vanda in a 12th round fight they had.