This article details the 2009–10 UEFA Champions League qualifying phase and play-off round.
[1] Copenhagen Levski Sofia Partizan Maccabi Haifa Dinamo Zagreb Wisła Kraków BATE Borisov Red Bull Salzburg Kalmar FF
Inter Turku Ekranas Bohemians Zrinjski Mostar Debrecen Sheriff Tiraspol WIT Georgia Makedonija G.P.
Baku Levadia Tallinn Tirana Aktobe Pyunik Rhyl Glentoran EB/Streymur F91 Dudelange Mogren[†] Sant Julià[†] Stabæk won 5–1 on aggregate.
In the Champions Path, teams with a coefficient of at least 7.733 were seeded.
In the Non-Champions Path, teams with a coefficient of at least 32.065 were seeded.
[1] Olympiacos Copenhagen[†] Slavia Prague Levski Sofia[†] Partizan[†] Maccabi Haifa[†] Dinamo Zagreb[†] Zürich Levadia Tallinn[†] BATE Borisov[†] Red Bull Salzburg[†] Debrecen[†]
Stabæk[†] Slovan Bratislava[†] Ventspils[†] Maribor[†] Aktobe[†] Sheriff Tiraspol[†] Baku[†] Shakhtar Donetsk Sporting CP Panathinaikos Celtic Anderlecht Sparta Prague Twente Dynamo Moscow Timișoara Sivasspor Red Bull Salzburg won 3–2 on aggregate.
In the Champions Path, teams with a coefficient of at least 14.050 were seeded.
In the Non-Champions Path, teams with a coefficient of at least 45.339 were seeded.
[1] Olympiacos Copenhagen Levski Sofia Maccabi Haifa Zürich Red Bull Salzburg
Ventspils Debrecen Sheriff Tiraspol Arsenal Lyon Sporting CP Panathinaikos VfB Stuttgart Fiorentina Atlético Madrid Celtic Anderlecht Timișoara Olympiacos won 3–0 on aggregate.