Marios Ikonomou

In 2012, Oikonomou was capped by Greece U21s. On 16 March 2016, he was called for the first time to play for the senior team in two friendly matches against Iceland and Montenegro. On 24 March 2016, he made his debut with the senior side as a substitute for Kostas Manolas in a 2–1 home friendly game against Montenegro.

Club

International

PAS Giannina

Born in Ioannina, Oikonomou began playing football with PAS Giannina. He signed his first professional contract in January 2011. On 14 November 2012, he made his debut for the Greece U21 in a friendly match against Austria U21. He made 23 appearances for the club in total.

Cagliari

After a strong 2012–13 season with PAS Giannina, Oikonomou signed a contract with Cagliari, a team in Serie A, the top league in Italy. He was the first ever player in the history of PAS Giannina who managed to sign directly a contract with a foreign club. His former club received €500,000 and later a small percentage of a future resale. On 6 April 2014, he made his debut with the club in a home loss against Roma.

Bologna

On 1 July 2014, Oikonomou signed a contract with Bologna in Serie B, in a transfer deal which involved striker Alessandro Capello, who moved permanently from Bologna to Cagliari. Oikonomou opted for this transfer as he had made very few appearances for Cagliari during the previous season. On 23 September 2014, he made his debut for the club, scoring the winning goal in a 1–0 away win against Ternana Calcio. He had a very good season with Bologna which attracted attention of several other Italian clubs, such as Lazio and Hellas Verona. Despite his initial strong performances on the pitch, Oikonomou playing time dwindled after the club acquired services of another centre-back, Daniele Gastaldello in March 2015. On 9 June 2015, Oikonomou…

Copenhagen

Danish Superliga: 2021–22 The Atlantic Cup runner-up: 2022