Career
He lost in his challenge for the WBA and IBF titles against Sven Ottke. In October 1993, Larsen turned professional winning his first fight in Storebaelthallen, Korsoer, Denmark on the undercard of a bill that included Danish stars Johnny Bredahl, Jimmy Bredahl and Brian Nielsen. In that fight Larsen beat England"s Martin Jolley with a knockout in the fourth round.
Title fights
Ottke fight
However, Larsen suffered the second defeat of his career when Ottke beat Larsen.
After a hard fought fight Larsen lost on points by a majority decision. Larsen made an unsuccessful comeback bid in February 2010, suffering a TKO to Brian Magee.
After the fight, Larsen was accused of doping on the basis of a blood-sample, but was later cleared of all charges by the Danish Boxing Association.