On September 18, 2001, just one day before opening night in Elitserien, Ikonen injured his knee severely in practice. Two junior players skating with the big team fell on top of him, leaving the Finn sidelined for the large bulk of the season. Ironically, Joel Lundqvist, one of those players, enjoyed a breakthrough year in Ikonen's abscence. Ikonen returned late in the season, but was never quite his old self again. He retired after the 2002 playoffs.