By Per Ake Persson

Hard-punching German light heavyweight contender Dustin Dirks (24-0, 18KOs) has been named as the official challenger for EU champion Orial Kolaj (9-5, 6KOs), who won his last four bouts in a row. Dirks fights Sandro Siproshvili (25-13, 12KOs) on this Saturday's undercard to the Robert Stieglietz vs. Arthur Abraham event at the O2 World Arena in Berlin, Germany.