The UEFA Champions League remains club football’s most prestigious competition, but its structure changed fundamentally with the introduction of the expanded format from the 2024-25 season. The familiar eight groups of four are gone. In their place sits a single 36-team league, a play-off tier, and a knockout bracket that rewards strong early-season form. If you have found the new system confusing, you are not alone. Here is how it actually works, step by step.
Who gets in: qualification and the 36 places
The Champions League expanded from 32 to 36 clubs. Most places are allocated through domestic league finishes, with Europe’s strongest leagues by UEFA coefficient receiving multiple automatic berths, while champions of smaller leagues enter through summer qualifying rounds. The expansion also added performance-based places: additional spots go to the two national associations whose clubs performed best in Europe the previous season, meaning a strong continental campaign by a country’s clubs can earn an extra Champions League place for that league the following year.
The title holders are guaranteed entry, and a place is also reserved via the Europa League winners. The practical effect is that the field is slightly broader than before, with the deepest leagues sometimes sending five clubs rather than four.
The league phase: one table, eight games
This is the biggest change. Instead of being drawn into a group of four and playing six matches, every club now sits in one combined 36-team table and plays eight league-phase matches, each against a different opponent. No club plays the same team twice in this phase.
To balance the fixtures, the 36 clubs are seeded into four pots based on their UEFA club coefficient. Each team is drawn to face two opponents from each of the four pots, one at home and one away, producing four home games and four away games. The draw is conducted with software assistance because the number of valid fixture combinations is far too large to handle with physical balls alone.
Scoring is conventional: three points for a win, one for a draw. Because everyone’s results feed into a single standings list, a club’s fate can swing on matches it is not even playing, and the final matchday, with all 18 fixtures kicking off simultaneously, has become one of the most chaotic and entertaining nights in the football calendar.
The cutoff: top eight, the play-off tier, and elimination
When the eight league-phase rounds are complete, the table splits into three tiers, and this is where the format’s incentives really bite.
The top eight clubs advance directly to the round of 16. This is the prize for consistency: skipping an entire knockout round, gaining roughly a month of breathing room in February, and earning a seeded path.
Clubs finishing ninth through 24th drop into a two-legged knockout phase play-off. The teams ranked 9th to 16th are seeded and face an unseeded opponent from the 17th-24th band, with the seeded club hosting the second leg. Win, and you join the top eight in the round of 16. Lose, and your European season is over.
That last point matters: clubs finishing 25th to 36th are eliminated outright. Under the old system, third-placed group teams parachuted into the Europa League; that safety net no longer exists in this competition. Finish in the bottom third and there is no European consolation.
The knockout rounds: a bracket with built-in rewards
From the round of 16 onwards, the competition follows a fixed, tennis-style bracket. Every tie except the final is played over two legs, home and away, with extra time and penalties available in the second leg if the aggregate score is level. League-phase position shapes the draw: clubs that finished in the top four of the table are placed so that they host the second leg in both the round of 16 and the quarter-finals, a meaningful edge in tight ties.
Because the bracket is set in advance, clubs can see their potential route to the final from February, another reason league-phase position carries real weight. The final itself is a single match at a pre-selected neutral venue. The 2026 final was staged at the Puskas Arena in Budapest, where Paris Saint-Germain retained the trophy by beating Arsenal 4-3 on penalties after a 1-1 draw, becoming the first club since Real Madrid in 2017 to win back-to-back titles in the Champions League era.
Why the format changed, and what it means for fans
UEFA’s stated aims were more meaningful matches and more variety: under the old group format, clubs faced only three opponents and many final group games were dead rubbers. The single table largely fixes that, since almost every result shifts someone’s position, and the pot system guarantees each club a spread of opponents from Europe’s elite down to its emerging champions. Critics counter that the calendar has grown heavier, with eight league-phase games plus a possible play-off replacing six group matches, feeding the broader workload debate in the sport.
For viewers, the practical takeaways are simple. The league phase runs from autumn into late January; watch the 9th-to-24th band closely in the final rounds, because that is where the drama concentrates. The play-offs in February are sudden-death. And from March, it is the classic two-legged knockout football the competition has always been famous for. The format rewards the clubs that treat September as seriously as April, which is exactly the point.
The Champions League’s evolution is part of a wider story about how football’s competitions and broadcast economics are being reshaped, themes we explore in our pieces on streaming platforms changing sports broadcasting and why club ownership models matter. And if you want to see the stakes of this format in action, look no further than this season’s Premier League, where Champions League qualification shaped the storylines of the entire campaign.
