 Increasingly popular and seen as a role model, a disagreement over his captaincy and his role within the Dortmund squad between the chairman, "Dr. Gerd Niebaum", and the team manager, Reinhard Saftig, resulted in a change of manager at the club with Saftig's successor, Horst Köppel, leaving no doubt over him having the same point of view as the chairman regarding Mill's role for the club's first-team.Mill looked a bit out of form after Köppel's take over, he had won bronze with Germany at the 1988 Summer Olympics in late summer 1988, and his once so impressive scoring quota faded.Still, he remained an important player for his club and was, kind of subsequently, part of the Dortmund team that lifted the DFB-Pokal trophy in 1989, beating bookie-favourites Werder Bremen in the final.