Fritz Sdunek's career started in amateur boxing. Its highlight was a victory at a Students Championship of East Germany in 1968. He won 99 of his 129 amateur fights, then decided to become a trainer.
In 1979 he graduated from the Deutsche Hochschule für Körperkultur (a university) with a diploma as a sport teacher.
Since the 1960s Sdunek was a member of a sport club Traktor Schwerin, where he also worked as a trainer until 1989. There he trained among others Andreas Zülow, who won a gold medal (lightweight) at 1988 Summer OlympicsinSeoul.
From 1994 until his death in 2014 Sdunek was active as a trainer for a famous Hamburg boxing promotion organization Universum Box-Promotion.
Sdunek was married and had two children - a son and a daughter. His daughter was married to Ahmet Öner,[1] a German of Turkish descent, head of Hamburg professional promotional firm Arena Box-Promotion and ex-professional boxer.
He died in a hospital in Hamburg on 22 December 2014, at the age of 67 following a heart attack he had suffered earlier on the island of Gran Canaria.[2]