Fritz Sdunek (German pronunciation: [ˈzduːnɛk]; 18 April 1947 – 22 December 2014) was a German professional boxing trainer and previously an amateur boxer. Regarded[by whom?] as one of the most successful and famous boxing trainers, he trained, among others, such world champions as Wladimir and Vitali Klitschko and Dariusz Michalczewski. He was born in Lüssow, East Germany.