Career
Lavanchy started his career with Football Club Lausanne-Sport as an academy player. At Lausanne he was able to rise through the youth ranks and actually broke into the first-team before he"d even made his reserve team debut. He made his debut for Lausanne-Sport in a Swiss Challenge League match on 15 April 2010 in a 2-2 away draw against Football Club Biel-Bienne.
He would go to make three more appearances during the 2009-2010 season though he has not made a league appearance for the club since then
Lavanchy is a Switzerland youth international having played at both under-17 and under-18 level In 2010 represented Switzerland at the Union of European Football Associations Under-17 European Championship.