A draw is conducted to determine the ties and which club plays the first leg at home for each match of the first, second and third rounds. In principle, the pairings are determined by an open draw. If, for any reason, any of the participants in the rounds concerned are not known at the time of the draw, the undecided tie will feature as an option for the draw.
The UEFA administration may form groups for the draw in accordance with the principles set by the Club Competitions Committee.