UEFA squad lists: why a new signing is not allowed to play

The question that brings almost everyone here is always the same one: the club signed him, he trains with the group, he shows up in the warm-up photos, and he still does not play in the Champions League. The answer is not in the medical room or in the manager's head. It is in a list of 25 names the club files with UEFA on a fixed date and cannot touch afterwards.

That document is List A, and it decides who exists for the competition. The 2026/27 regulations stagger the deadline by round: 2 July for the first qualifying round, 16 July for the second, 30 July for the third, 13 August for the play-offs and 2 September, each at 23:59 CET. The last one is the one that hurts. The list filed on 2 September covers every match from the first match of the league phase up to and including the final, so a player left off it misses all of those matches while training with the squad every day.

The 25 places are not 25 free places

The ceiling is plain: no club may carry more than 25 players on List A during the season. But eight of those places are reserved exclusively for locally trained players, and no more than four of those eight may be association-trained players. The arithmetic almost nobody does is what follows. At least four of the 25 must have been trained by the club itself, and only 17 places are free of any training requirement.

The two labels are not interchangeable. A club-trained player is one who, between the ages of 15 and 21, was registered with his current club for three entire seasons or 36 months, continuously or not, regardless of nationality. An association-trained player served that same time in that same age window, but at any club affiliated to the same association as his current club. Together they make up the locally trained category; only the first counts as a product of the club's own academy.

A club that falls short of the quota gets no waiver. It loses places. If it has fewer than eight locally trained players on List A, the maximum size of the list is reduced accordingly: six locally trained players means a 23-man list, not a 25-man one. There is also a positional floor. List A must include at least two goalkeepers, and the club must have at least three in total across List A and List B.

List B has no ceiling, and that is how the teenager plays

List B is the other half of the same regulation and works the opposite way. A club may register an unlimited number of players on it during the season, and there is no September cut-off: it can be filed up to 23:59 CET on the day before each match. That is why a youngster who was not in anyone's plans in August can make his debut in November.

The gate is narrow, though. For 2026/27, List B is open to a player born on or after 1 January 2005 who, since his 15th birthday, has been eligible to play for the club for two uninterrupted years. Three consecutive years qualify as well, with a maximum of one loan of up to one year to a club in the same association. Players aged 16 may be listed if they have been registered with the club, without interruption, for the two previous years.

What can still change after the deadline

The mid-league-phase exceptions are few and narrow. A goalkeeper injured for at least 30 days may be replaced with medical evidence submitted to UEFA, and in that case the replacement does not have to be locally trained. A goalkeeper transferred on a permanent basis may be replaced after matchday six and before the end of the league phase. An outfield player injured for at least 60 days may be replaced up to matchday six, provided the replacement was already registered with the club before the List A deadline.

The January signing arrives later. After the league phase ends and before the knockout phase starts, a club may register a maximum of three new eligible players for the rest of the competition, with a deadline of 4 February 2027 at 23:59 CET. Clubs from national leagues that start and finish in the same calendar year (the calendar-year format used in Brazil, among others) get more room: if more than five List A players have left, they may register four; if more than seven have left, five. And if the new entries push List A past 25, someone has to come off to bring it back to the ceiling, with the locally trained quota applying to that swap as well.

One point is still repeated wrongly all the time. The general rule is that a player may not turn out for more than one club in the Champions League, Europa League or Conference League in a single season. But the same article opens two doors: a player used in the first, second or third qualifying round, or in the play-offs of any of the three competitions, may play for another club from the league phase onwards, and from the start of the knockout phase registration follows the three-signing rule. The regulations say explicitly that any or all of those signings may have been fielded for another club in the qualifying phase, the play-offs or the league phase. A substitute who never came on is also free to play for another club in the same season, as long as he was registered with UEFA.

England uses the same number and counts from the other end

Premier League squads are capped at 25 too, but the rule does not count how many home-grown players you have. It counts how many players you may have who are not. Each club's squad may contain no more than 17 players who do not meet the Home Grown Player criteria; the rest, up to a total of 25, must be home grown. The English definition is a single category with no subdivision: a player who, irrespective of nationality or age, has been registered with any club affiliated to The Football Association or the Football Association of Wales for three entire seasons, or 36 months, continuous or not, before his 21st birthday, or the end of the season in which he turns 21.

Those differences change how a squad is built. UEFA demands training at the club itself in at least four of the eight reserved places; England accepts any club affiliated to the FA or the Welsh association and draws no line between an academy graduate and a player developed elsewhere in the country. England also grants relief that the Champions League does not: Under-21 players do not take up a place on the 25-man list and are eligible on top of the limit. That age cut-off is set season by season: in 2025/26 it covered players born on or after 1 January 2004, against 1 January 2003 in 2024/25 and 1 January 2002 in 2023/24. English squad lists are filed after each transfer window closes and may only be amended during a window.