Within the club he soon became an important player despite the concurrence for the striker position, and the Yugoslav league in those days was considered to be one of the most competitive ones.
He is specially remembered among Partizan fans for scoring the decisive goal in a tied match with Celtic that ended 6-6 on aggregate, with goals away advantage for Partizan, and made them advance into the 1/8 finals of the 1989 UEFA Cup Winners Cup.
Beside winning one championship and being league's top scorer, he also lost two Cypriot Cup finals, in 1993 and 1995.
In July 2013 the Spanish EFE news agency wrongly stated that Slađan was a goalkeeper,[1] being rectified in Stefan Šćepović's website.
His son, Marko followed the tradition of his father becoming a Partizan player and has played with them in the 2010–11 UEFA Champions League.