Who are the four players whose contracts were renewed?
Olympiacos academy directorate confirmed the extensions for Christos Filis, Giorgos Siozios, Apostolos Martinis and Nikos Avramoulis. All four belong to the K23 group and have been part of the club’s youth pathway for varying lengths of time. The announcement from the academy directorate lists each player by name and confirms they have signed new contracts with the club. The source provides no information on the duration of the new deals or any financial terms attached to the renewals, leaving those details unsettled.
Christos Filis background and recent appearances
Christos Filis was born on 25 June 2007 and plays as a midfielder. He began his career in the Olympiacos academy and won league titles at both under-17 and under-19 levels. During the 2025-26 season he made his professional debut with the K23 side in the Super League K23. In the current campaign he started both matches for the first team in the Superbet Greek Cup league phase and took part in pre-season training with the senior squad. The source notes that the club places significant expectations on the young midfielder given these early opportunities. No further statistics on minutes played or specific performances are supplied, and the announcement does not indicate whether additional first-team call-ups are planned.
Giorgos Siozios path through the youth ranks
Giorgos Siozios was born on 11 February 2009 and plays as a defender. He joined the Olympiacos academy at a young age and has competed in the under-15, under-17 and under-19 competitions. He also appeared in Super League 2 this season, making his debut for the K23 team against PAOK B at Toumba stadium. Like Filis, he participated in the first-team pre-season programme. The announcement records that despite his young age he has already sampled multiple age-group and reserve levels. The source supplies no additional data on his total appearances or future role within the squad.
Apostolos Martinis return to the club
Apostolos Martinis was born on 8 January 2001 and plays as a defender. He progressed through the Olympiacos academy before moving to Aris, Panathinaikos B and Hibernians FC in Malta. He rejoined Olympiacos in summer 2025 to play for the K23 side. The source states that his path included time outside the club before the 2025 return. No details are given on his performances during those external spells or on any specific targets set for his second stint at Olympiacos.
Nikos Avramoulis arrival and first professional outing
Nikos Avramoulis was born on 6 August 2008 and plays as a defender. He transferred from the AE L academy to Olympiacos in summer 2025. He has featured for the under-17 and under-19 teams and made his professional debut for the K23 side on 9 September 2026 in an away Super League 2 fixture against PAOK B. The announcement specifies the exact date of this debut. The source does not mention any further appearances or how the club views his long-term prospects.
Context of the K23 squad within Olympiacos structure
The K23 team serves as the final development stage before players move toward the first team or loans. The four contract extensions reflect the club’s continued investment in players who have already shown they can handle reserve and, in some cases, senior football. No further details on future plans or specific targets are provided in the source. The announcement leaves open how these players will be integrated or whether any will be loaned out during the season.
Frequently asked questions
What positions do the renewed players occupy?
Christos Filis plays in midfield while Giorgos Siozios, Apostolos Martinis and Nikos Avramoulis all play in defence.
When did each player join or return to Olympiacos?
Filis and Siozios progressed through the academy from early ages. Martinis returned in summer 2025 after spells elsewhere. Avramoulis arrived from AE L academy in summer 2025.
Have any of them played for the first team?
Christos Filis has started matches for the senior side in the Greek Cup. The others have trained with the first team but their competitive minutes remain at K23 or lower levels.
What competitions have they featured in recently?
Players have appeared in the Super League K23, Super League 2 and, for Filis, the Greek Cup. Several took part in the club’s summer pre-season.
Why does Olympiacos extend academy contracts at this stage?
The club uses these extensions to retain players who have reached the K23 level and shown potential for further progression within the professional setup.
