 On club level his fading punch in front of the goal saw him going through a proper transformation from the scorer to the assist winner, but this couldn't stop him from getting more and more on the fringes of the Borussia Dortmund first-team.In 1991, Köppel departed as manager and his successor at the helm of Dortmund's coaching, then fameless Ottmar Hitzfeld, started to set his stamp on the development of the club.With Stephane Chapuisat and Flemming Povlsen Hitzfeld's regular picks in the Dortmund frontline, Mill was more and more handed a sub-role and, at the end of Hitzfeld's debut season in charge of the club, missing out on the Bundesliga title again.