The 2019–20 UEFA Champions League qualifying phase and play-off round began on 25 June and ended on 28 August 2019.
The six winners in the play-off round (four from Champions Path, two from League Path) advanced to the group stage, to join the 26 teams that enter in the group stage.
The team that scores more goals on aggregate over the two legs advance to the next round.
If no goals are scored during extra time, the tie is decided by penalty shoot-out.
In the preliminary round, where single-match semi-finals and final are hosted by one of the participating teams, if scores are level at the end of normal time, extra time is played, followed by penalty shoot-out if scores remain tied.
As the identity of the winners of the previous round is not known at the time of the draws, the seeding is carried out under the assumption that the team with the higher coefficient of an undecided tie advances to this round, which means if the team with the lower coefficient is to advance, it simply take the seeding of its opponent.
Prior to the draws, UEFA may form "groups" in accordance with the principles set by the Club Competitions Committee, but they are purely for convenience of the draw and do not resemble any real groupings in the sense of the competition.
Teams from associations with political conflicts as decided by UEFA may not be drawn into the same tie.
After the draws, the order of legs of a tie may be reversed by UEFA due to scheduling or venue conflicts.
The schedule is as follows (all draws are held at the UEFA headquarters in Nyon, Switzerland).
[6] A total of four teams were involved in the preliminary round draw.
[11] A total of 24 teams were involved in the second qualifying round draw.
The draw for the third qualifying round was held on 22 July 2019, 12:00 CEST.
[13] A total of 20 teams were involved in the third qualifying round draw.
The draw for the play-off round was held on 5 August 2019, 12:00 CEST.
[15] A total of 12 teams were involved in the play-off round draw.