The first, second and third rounds of the domestic champions path are played under the knockout system, whereby each club 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.