Kai SchwertfegerKai Schwertfeger is a German former professional footballer who played as a defensive midfielder.CareerSchwertfeger began his career with the youth team of Mettmanner SC and signed in summer 1997 an youth contract for Fortuna Düsseldorf. He made his professional debut for Fortuna Düsseldorf on 13 May 2008 in the Regionalliga Nord against VfL Wolfsburg II.