Greek football clubs AEK, Olympiacos, Panathinaikos and OFI face a strict UEFA deadline of 00:59 on Thursday, September 3, to register their squad rosters for the upcoming European League Phase.
The deadline creates a tighter window for the four Stoiximan Super League teams competing in Europe, who must complete and register any new signings before that time to use them in European matches.
While European squad registration closes early on Thursday morning, the summer transfer window in Greece remains open until 23:59 on September 15 for the 2026-2027 season. This gives Greek clubs additional time to make squad changes for domestic competitions after the European deadline passes.
AEK, Olympiacos, Panathinaikos and OFI represent Greek football in European competition under UEFA, the governing body of European football. The Stoiximan Super League is the top tier of domestic football in Greece, and the UEFA League Phase forms the main stage of European club tournaments.
Major European transfer deadlines
Transfer windows across major European leagues are closing rapidly. In Italy and Germany, the transfer period ends on Tuesday, September 1, at 21:00, aligning with the closure of the window in France. Specifically, Italy's Serie A, Germany's Bundesliga and France's Ligue 1 all share the same 21:00 closing time on September 1.
In England and Spain, the transfer windows also close on Tuesday, but at midnight. Official deadline times are set at 01:00 on September 2 for England's Premier League and 00:59 on September 2 for Spain's La Liga.
The Premier League in England, La Liga in Spain, Serie A in Italy, the Bundesliga in Germany and Ligue 1 in France represent the traditional top domestic leagues in European football.
Transfer windows in other European nations remain open slightly longer. The registration period ends at 00:59 on Wednesday, September 3, for the Eredivisie in the Netherlands, followed by the Pro League in Belgium at 00:59 on Thursday, September 4.
In Portugal, the Liga Portugal window closes at 01:59 on September 5, while Turkey's Süper Lig window remains open until 23:59 on September 4. Central and Eastern European leagues also have later dates, with the Chance Liga in the Czech Republic closing at 00:59 on September 9 and the Ekstraklasa in Poland closing at 00:59 on September 10.
Extended deadlines and global windows
In Nordic countries, the Eliteserien in Norway and the Superliga in Denmark both close their transfer windows at 00:59 on September 3. The Cyprus League deadline follows at 23:59 on September 9.
The Saudi Professional League in Saudi Arabia will maintain an extended transfer window compared to European leagues. Clubs in the kingdom remain particularly active in the transfer market and can continue signing players until October 12.
With time running out for squad adjustments for the 2026-2027 season, clubs across Greece and Europe are entering the final stretch to conclude major deals before their respective registration deadlines expire.
