Career
Duhnke began his career with Turn- und Sportverein 1860 München, and made one 2. He made 56 appearances for 1860"s reserve team, often as captain, and scored for the first-team in a friendly match against Bayern Munich in January 2008 which ended 1–1. Six months later, Duhnke joined Bayern, to play for reserve team in the 3.
Liga.
Football Club Union Berlin. He made 33 appearances for Bayern II over the next two seasons, leaving after the team were relegated at the end of the 2009-2010 season. He spent half a season without a club, signing for Austrian side USK Anif in January 2011.
Eighteen months later he returned to Germany to sign for Würzburger Kickers of the Regionalliga Bayern.
