Below are the 160 teams involved in the qualifying phase and play-off round, grouped by their starting rounds. The 37 winners of the play-off round qualified for the
group stage to join the 10 losing teams from the
Champions League play-off round, and the title holders,
Atlético Madrid. In each round, teams were seeded based on their 2010
UEFA club coefficients. Prior to the draw, 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, while ensuring that teams from the same association not drawn against each other. ;Notes ==First qualifying round==