Seeded
Olympiacos (GRE) 70.940
Viktoria Plzeň (CZE) 44.585
FC Salzburg (AUT) 42.520 or Liepāja (LVA)
Celtic (SCO) 40.460 or Lincoln (GIB)
APOEL (CYP) 35.935 or The New Saints (WAL)
BATE Borisov (BLR) 34.000 or SJK Seinäjoki (FIN)
Legia Warszawa (POL) 28.000 or Zrinjski (BIH)
Dinamo Zagreb (CRO) 25.775 or Vardar (MKD)
Ludogorets Razgrad (BUL) 25.625 or Mladost Podgorica (MNE)
FC København (DEN) 24.720 or Crusaders (NIR)

Unseeded
Qarabağ (AZE) 13.475 or F91 Dudelange (LUX)
Rosenborg (NOR) 12.850 or IFK Norrköping (SWE)
Astana (KAZ) 12.575 or Žalgiris Vilnius (LTU)
Astra Giurgiu (ROU) 11.076
Sheriff (MDA) 10.575 or Hapoel Beer-Sheva (ISR)
Crvena zvezda (SRB) 7.175 or Valletta (MLT)
Dinamo Tbilisi (GEO) 5.875 or Alashkert (ARM)
FH Hafnarfjördur (ISL) 5.750 or Dundalk (IRL)
Trenčín (SVK) 5.400 or Olimpija Ljubljana (SVN)
Ferencváros (HUN) 3.475 or Partizani* (ALB)

Seeded
AZ Alkmaar (NED) 43.612
Genk (BEL) 36.000 or Budućnost Podgorica (MNE)
Lille (FRA) 29.549
Saint-Étienne (FRA) 26.049
Gent (BEL) 25.000
Krasnodar (RUS) 24.216
Rapid Wien (AUT) 23.520
Slovan Liberec (CZE) 22.085
Maribor (SVN) 21.625 or Levski Sofia (BUL)
Maccabi Tel-Aviv (ISR) 20.225 or Kairat Almaty (KAZ)
Spartak Moskva (RUS) 19.216
Austria Wien (AUT) 19.020 or Kukës (ALB)
Partizan (SRB) 16.925 or Zagłebie Lubin (POL)
West Ham United (ENG) 16.256
Hertha Berlin (GER) 16.035
Panathinaikos (GRE) 14.940
Midtjylland (DEN) 14.720 or Vaduz (LIE)
Rijeka (CRO) 14.275
Sassuolo (ITA) 14.087
Rio Ave (POR) 13.616
Vorskla Poltava (UKR) 11.976
Maccabi Haifa (ISR) 11.725 or Nőmme Kalju (EST)
HJK Helsinki (FIN) 10.980 or Beroe Stara Zagora (BUL)
Hajduk Split (CRO) 10.775 or laşi (ROU)
Arouca (POR) 10.616
Apollon Limassol (CYP) 10.435
Mladá Boleslav (CZE) 10.085
Dinamo Minsk (BLR) 10.000 or St Patrick's Athletic (IRL)
Omonia (CYP) 9.935 or Beitar Jerusalem (ISR)

Unseeded
Grasshoppers (SUI) 9.755 or KR Reykjavík (ISL)
Neftçi PFK (AZE) 9.725 or Shkëndija (MKD)
AEK Larnaca (CYP) 9.435 or Cliftonville (NIR)
Oleksandriya (UKR) 8.976
AIK Solna (SWE) 8.975 or Europa (GIB)
Slovan Bratislava (SVK) 8.900 or Jelgava (LVA)
Luzern (SUI) 8.775
Videoton (HUN) 8.725 or Čukarički (SRB)
AEK Athens (GRE) 7.940
Vojvodina (SRB) 7.925 or Connah's Quay (WAL)
İstanbul Başakşehir (TUR) 7.920
Strømsgodset (NOR) 7.850 or SønderjyskE (DEN)
Shakhtyor Soligorsk (BLR) 7.500 or Domžale (SVN)
Spartak Trnava (SVK) 7.400 or Shirak (ARM)
Brøndby (DEN) 7.220 or Hibernian (SCO)
Heracles (NED) 7.112
Pandurii Târgu Jiu (ROU) 7.076
Osmanlıspor* (TUR) 6.920 or Zimbru Chisinau (MDA)
Slavia Praha (CZE) 6.585 or Levadia Tallinn (EST)
Debrecen (HUN) 6.475 or Torpedo-Belaz Zhodino (BLR)
IFK Göteborg (SWE) 6.475 or Piast Gliwice (POL)
Hearts (SCO) 6.460 or Birkirkara (MLT)
Admira Wacker Mödling (AUT) 6.020 or Käpäz (AZE)
Ventspils (LVA) 6.075 or Aberdeen (SCO)
Häcken (SWE) 5.975 or Cork City (IRL)
Giannina (GRE) 5.940 or Odd (NOR)
Lokomotiva Zagreb (CRO) 5.775 or RoPS Rovaniemi (FIN)
Qäbälä (AZE) 5.225 or MTK Budapest (HUN)
Viitorul Constanţa (ROU) 5.076