The majority of clubs in Europe's leading competition did not win anything to get there. Entry is governed by an access list that assigns every place in advance.
The access list is published years ahead
Before a cycle begins, the organiser publishes a document naming exactly how many clubs each association enters and at which stage they join.
Every slot is identified by its origin, such as a national champion, a runner-up or a club entering from a specific league position.
Publishing early lets associations schedule their domestic seasons and lets clubs know precisely what a given league finish delivers.
League position is the main route
The highest-ranked associations receive several direct places awarded to clubs finishing in stated positions, so a fourth-placed club can enter alongside a champion.
The number of such places follows the association's coefficient, which is why one league's third place is worth more than another's title.
This is the largest single source of entrants and the reason domestic seasons are contested for qualification as much as for the title.
Holders and cup routes add entrants
The competition's holder is normally guaranteed a place, and in some formats the winner of the second-tier competition also qualifies.
Where a qualifying club has already secured entry by league position, the place passes down the domestic table rather than lapsing.
That cascade is why a league occasionally enters more clubs than its published allocation suggests. The access list anticipates these cases and states in advance where each vacated place goes.
Qualifying rounds are split into paths
Clubs entering before the main phase are divided into separate paths, one for domestic champions and another for clubs entering by position.
Keeping them apart means champions face each other rather than being eliminated immediately by clubs from stronger leagues.
A club knocked out in these rounds typically transfers into a lower competition rather than leaving Europe entirely. That transfer is written into the access list rather than decided afterwards.
The design decides what a league is playing for
Because places are allocated by association ranking, the value of finishing fourth in one country and first in another can be similar.
That shapes domestic competition, since clubs outside a title race still have a season-long objective with substantial revenue attached.
It also concentrates entrants in a small number of leagues, which is the standing criticism of access lists and the reason additional places for other routes are periodically debated.

