It is considered that his best work was for Xanthi with their chairman Christos Panopoulos.
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On 9 April 2000, the day of the Greek parliament elections, Olympiacos' chairman Sokratis Kokkalis sacked manager Alberto Bigon.
Ioannis Kapodistrias | Ioannis Pallikaris | Ioannis G. Tsatsaris | Ioannis Theodorakopoulos | Ioannis Poulos | Ioannis Persakis | Ioannis Matzourakis | Ioannis Liritzis | Ioannis Kyrastas | Ioannis Kakridis | Ioannis Charalambopoulos | Ioannis Bourousis | Ioannis Andreou |
After retiring in 1998, Mitropoulos became an assistant coach to Dusan Bajevic, Alberto Bigon, Yannis Matzourakis and Takis Lemonis in Olympiacos.