He retired from playing football at the age of twenty-eight after suffering a knee injury.

[1] Stamatopoulos started his managerial career with German side SC West Köln.

In 2003, he was appointed manager of German side SF Troisdorf.

In 2010, he was appointed manager of Greek side Pontioi Katerini FC.

After that, he was appointed manager of Estonian side Tartu JK Tammeka.