The first round of matches will be played on Thursday September 17

Group A
Ajax (NED)
Anderlecht (BEL)
Dinamo Zagreb (CRO)
FC Timisoara (ROU)

Group B
Valencia (SPN)
Lille (FRA)
Slavia Prague (CZE)
Genoa (ITA)

Group C
Hamburg (GER)
Celtic (SCO)
Hapoel Tel-Aviv (ISR)
Rapid Vienna (AUT)

Group D
Sporting (POR)
Heerenveen (NED)
Hertha Berlin (GER)
Ventspils (LAT)

Group E
Roma (ITA)
FC Basel (SUI)
Fulham (ENG)
CSKA Sofia (BUL)

Group F
Panathinaikos (GRE)
Galatasaray (TUR)
Dinamo Bucharest (ROU)
Sturm Graz (AUT)

Group G
Villarreal (SPA)
Lazio (ITA)
Levski Sofia (BUL)
Salzburg (AUT)

Group H
Steaua Bucharest (ROU)
Fenerbahce (TUR)
FC Twente (NED)
FC Sheriff (MDA)

Group I
Benfica (POR)
Everton (ENG)
AEK Athens (GRE)
BATE Borisov (BLR)

Group J
Shakhtar Donetsk (UKR)
Club Brugge (BEL)
Partizan Belgrade (SER)
Toulouse (FRA)

Group K
PSV Eindhoven (NED)
Copenhagen (DEN)
Sparta Prague (CZE)
CFR Cluj (ROM)

Group L
Werder Bremen (GER)
Austria Vienna (AUT)
Athletic Bilbao (SPA)
Nacional (POR)