During the 70s and the 80s, Anderlecht had lots of good Danish players: Torsten Andersen, Kenneth Brylle, Henrik Andersen, Per Frimann, Benny Nielsen, Frank Arnesen and of course central defender Morten Olsen, who made his debute for Anderlecht being already 31 years old! He arrived together with trainer Tomislav Ivic. He stayed until 1986 and showed to be a very decent player and a good rolemodel for young talents. 37 years old he was when he left the club for F.C. Köln. After his carreer he became trainer of the Danish club Bröndby.

Olsen arrived in Belgium in the year 1972 and joined Cercle Brugge. Then he went to RWD Molenbeek. Before his Belgian carreer, he had played for BK 1901 and Nyköping in Denmark. He was a dominant, sober and efficient defender with an excellent physical condition. Before and after the trainings, he worked on his condition himself and that way he ended up in Ivic' starting line-up. Together with Ludo Coeck, he was allowed to go forward whenever that was possible. When Paul Van Himst became coach, he swapped Olsen and Luka Peruzovic positions. But even as a defensive midfielder, Olsen appeared to be a real reinforcement. Olsen was never an individualist. With Sportinghe played two European finals. He won one against Benfica and lost one against Tottenham.