The qualifying phase and play-offs follow the knockout system, whereby each team plays each opponent twice, in home and away matches. The team that scores the greater aggregate of goals in the two matches qualifies for the relevant round or stage (as applicable). In the event that the two teams score the same number of goals across the two matches, Article 21 applies.
The UEFA administration may decide that a tie be played in one leg, if circumstances so require, and will set the principles for determining the winner accordingly.
Clubs eliminated as of the second qualifying round of the UEFA Champions League are admitted to the ongoing UEFA Europa League as shown in the table of Paragraph 3.06, which also indicates where clubs subsequently eliminated from the UEFA Europa League enter the ongoing UEFA Conference League.