 Kọ itẹsiwaju fun paragirafi yii - Oikonomou ni awọn caps 25 pẹlu ẹgbẹ bọọlu inu agbọn orilẹ-ede Greece o si gba awọn aaye 160. Ó kópa nínú EuroBasket 1961 : , awọn Balkan Championship 1962 ati 1963, awọn 1960 Pre-Olympic Basketball idije ati awọn 1964 Pre-Olympic Basketball idije. 