The qualifying phase and play-off round of the 2013–14 UEFA Champions League were played from 2 July to 28 August 2013, to decide 10 of the 32 places in the group stage.
The team that scored more goals on aggregate over the two legs advanced to the next round.
If away goals were also equal, then thirty minutes of extra time was played.
If no goals were scored during extra time, the tie was decided by penalty shoot-out.
[1] In the draws for each round, teams were seeded based on their UEFA club coefficients at the beginning of the season, with the teams divided into seeded and unseeded pots.
For these draws (or in any cases where the result of a tie in the previous round was not known at the time of the draw), the seeding was carried out under the assumption that the team with the higher coefficient of an undecided tie advanced to this round, which means if the team with the lower coefficient was to advance, it simply took the seeding of its defeated opponent.
Prior to the draws, UEFA may form "groups" in accordance with the principles set by the Club Competitions Committee, but they were purely for convenience of the draw and for ensuring that teams from the same association were not drawn against each other, and did not resemble any real groupings in the sense of the competition.
[1] Below were the participating teams (with their 2013 UEFA club coefficients),[6] grouped by their starting rounds.
[24] Steaua București Viktoria Plzeň Sheriff Tiraspol Maribor Neftçi Željezničar Skënderbeu Birkirkara Vardar Sutjeska Celtic Legia Warsaw IF Elfsborg Molde
The New Saints Sligo Rovers Cliftonville Daugava Daugavpils Nõmme Kalju BATE Borisov Dinamo Zagreb Partizan Slovan Bratislava Maccabi Tel Aviv Dinamo Tbilisi Győri ETO Ludogorets Razgrad Shakhter Karagandy EB/Streymur[†] Shirak[†] Fola Esch The first legs were played on 16 and 17 July, and the second legs were played on 23 and 24 July 2013.
A total of 30 teams played in the third qualifying round:[63] The draw was held on 19 July 2013.
Partizan[†] Legia Warsaw[†] Maribor[†] Ludogorets Razgrad[†] Maccabi Tel Aviv[†] Molde[†] Dinamo Tbilisi[†] Shakhter Karagandy[†] Celtic[†] Viktoria Plzeň[†] Dinamo Zagreb[†] Austria Wien Sheriff Tiraspol[†] IF Elfsborg[†] Nõmme Kalju[†]
Skënderbeu[†] Lyon Zenit Saint Petersburg PSV Eindhoven Metalist Kharkiv Fenerbahçe
A total of 20 teams played in the play-off round:[96] The draw was held on 9 August 2013.
[97] Basel Celtic Steaua București Viktoria Plzeň Dinamo Zagreb Austria Wien Legia Warsaw Maribor Ludogorets Razgrad Shakhter Karagandy Arsenal Lyon Milan Schalke 04 Zenit Saint Petersburg PSV Eindhoven Metalist Kharkiv[†] Fenerbahçe Real Sociedad Paços de Ferreira The first legs were played on 20 and 21 August, and the second legs were played on 27 and 28 August 2013.