FC Levadia Tallinn – AC Sparta Praha
Referee: Antonio Damato (ITA, photo)
Assistant Referee 1: Lorenzo Manganelli (ITA)
Assistant Referee 2: Fabiano Preti (ITA)
Fourth Official: Gianpaolo Calvarese (ITA)
Referee Observer: Alan Snoddy (NIR)
FK Sutjeska – FC Sheriff
Referee: Alexander Harkam (AUT)
Assistant Referee 1: Andreas Witschnigg (AUT)
Assistant Referee 2: Andreas Staudinger (AUT)
Fourth Official: Rene Eisner (AUT)
Referee Observer: Gylfi Thor Orrason (ISL)
F91 Dudelange – PFC Ludogorets
Referee: Tobias Welz (GER)
Assistant Referees: Guido Kleve (GER), Rafael Foltyn (GER)
Fourth Official: Markus Schmidt (GER)
Referee Observer: Nuno Castro (POR)
FK Qarabağ Ağdam – Valletta FC
Referee: Sergei Tsinkevich (BLR)
Assistant Referees: Evgeni Romanov (BLR), Vitali Malyutin (BLR)
Fourth Official: Denis Scherbakov (BLR)
Referee Observer: Levan Paniashvili (GEO)
Maccabi Tel Aviv – FC Santa Coloma
Referee: Ioannis Anastasiou (CYP)
Assistant Referees: Athinodoros Ioannou (CYP), Marios Dimitriadis (CYP)
Fourth Official: Demetris Masias (CYP)
Referee Observer: Borislav Alexandrov (BUL)
The New Saints FC – ŠK Slovan Bratislava
Referee: Jakob Kehlet (DEN)
Assistant Referees: Lars Rix (DEN), Heine Sørensen (DEN)
Fourth Official: Jens Maae (DEN)
Referee Observer: Edward Foley (IRL)
KS Skënderbeu – FC Bate Borisov
Referee: Ante Vučemilović (CRO)
Assistant Referees: Dalibor Conjar (CRO), Hrvoje Barišić (CRO)
Fourth Official: Damir Batinić (CRO)
Referee Observer: Brian Lawlor (WAL)
HB Tórshavn – FK Partizan
Referee: Dimitar Meckarovski (MKD)
Assistant Referees: Dejan Nedelkoski (MKD), Goce Petreski (MKD)
Fourth Official: Dejan Jakimovski (MKD)
Referee Observer: Miroslav Liba (CZE)
VMFD Žalgiris – GNK Dinamo
Referee: Artyom Kuchin (KAZ)
Assistant Referees: Sergei Vassyutin (KAZ), Anatoli Hodin (KAZ)
Fourth Official: Aleksandr Gauzer (KAZ)
Referee Observer: Peter Jones (ENG)
Debreceni VSC – Cliftonville FC
Referee: Vlado Glodjović (SRB)
Assistant Referees: Dejan Petrović (SRB), Dejan Potoćan (SRB)
Fourth Official: Dejan Santrac (SRB)
Referee Observer: Adrian Casha (MLT)
Celtic FC – KR
Referee: Andris Treimanis (LVA)
Assistant Referees: Haralds Gudermanis (LVA), Aleksejs Spasjonnikovs (LVA)
Fourth Official: Vadims Direktorenko (LVA)
Referee Observer: Kyros Vassaras (GRE)
FC Aktobe – Dinamo Tbilisi
Referee: Aliyar Aghayev (AZE)
Assistant Referees: Zeynal Zeynalov (AZE), Namik Huseynov (AZE)
Fourth Official: Rauf Jabarov (AZE)
Referee Observer: Vladimir Antonov (MDA)
FK Ventspils – Malmö FF
Referee: Kristo Tohver (EST)
Assistant Referees: Sten Klaasen (EST), Neeme Neemlaid (EST)
Fourth Official: Roomer Tarajev (EST)
Referee Observer: Konrad Plautz (AUT)
Fourth Official: Aleksandr Gauzer (KAZ)
Referee Observer: Peter Jones (ENG)
Debreceni VSC – Cliftonville FC
Referee: Vlado Glodjović (SRB)
Assistant Referees: Dejan Petrović (SRB), Dejan Potoćan (SRB)
Fourth Official: Dejan Santrac (SRB)
Referee Observer: Adrian Casha (MLT)
Celtic FC – KR
Referee: Andris Treimanis (LVA)
Assistant Referees: Haralds Gudermanis (LVA), Aleksejs Spasjonnikovs (LVA)
Fourth Official: Vadims Direktorenko (LVA)
Referee Observer: Kyros Vassaras (GRE)
FC Aktobe – Dinamo Tbilisi
Referee: Aliyar Aghayev (AZE)
Assistant Referees: Zeynal Zeynalov (AZE), Namik Huseynov (AZE)
Fourth Official: Rauf Jabarov (AZE)
Referee Observer: Vladimir Antonov (MDA)
FK Ventspils – Malmö FF
Referee: Kristo Tohver (EST)
Assistant Referees: Sten Klaasen (EST), Neeme Neemlaid (EST)
Fourth Official: Roomer Tarajev (EST)
Referee Observer: Konrad Plautz (AUT)
HJK Helsinki – FK Rabotnicki
Referee: Neil Doyle (IRL)
Assistant Referees: Damien MacGraith (IRL), Dermot Broughton (IRL)
Fourth Official: Padraigh Sutton (IRL)
Referee Observer: Guy Goethals (BEL)
Steaua București – Strømsgodset
Referee: Eitan Shmuelevitz (ISR)
Assistant Referees: Danny Krasikow (ISR), Nissan Davidy (ISR)
Fourth Official: Alon Yefet (ISR)
Referee Observer: Vitor Melo Pereira (POR)
NK Maribor – HŠK Zrinjski Mostar
Referee: Sergey Lapochkin (RUS)
Assistant Referees: Nikolay Golubev (RUS), Aleksei Lebedev (RUS)
Fourth Official: Mikhail Vilkov (RUS)
Referee Observer: Peter Fröjdfeldt (SWE)
Saint Patrick's Athletic – Legia Warszawa
Referee: Andreas Ekberg (SWE)
Assistant Referees: Fredrik Nilsson (SWE), Mehmet Culum (SWE)
Fourth Official: Johan Hamlin (SWE)
Referee Observer: Stefan Ormandjiev (BUL)
Referee Observer: Peter Fröjdfeldt (SWE)
Saint Patrick's Athletic – Legia Warszawa
Referee: Andreas Ekberg (SWE)
Assistant Referees: Fredrik Nilsson (SWE), Mehmet Culum (SWE)
Fourth Official: Johan Hamlin (SWE)
Referee Observer: Stefan Ormandjiev (BUL)