HJK Helsinki – Alashkert FC
Referee: Bram Van Driessche (BEL, photo)
Assistant Referee 1: Yves De Neve (BEL)
Assistant Referee 2: Kevin Monteny (BEL)
Fourth Official: Kevin Van Damme (BEL)
Referee Observer: Georgios Bikas (GRE)
Flora Tallinn – FK Partizan
Referee: Robert Harvey (IRL)
Assistant Referee 1: Wayne McDonnell (IRL)
Assistant Referee 2: Darragh Keegan (IRL)
Fourth Official: Neil Doyle (IRL)
Referee Observer: Aleksandr Gvardis (RUS)
Kairat Almaty – FC Basel
Referee: Goga Kikacheishvili (GEO)
Assistant Referee 1: Davit Gabisonia (GEO)
Assistant Referee 2: Giorgi Elikashvili (GEO)
Fourth Official: Irakli Kvirikashvili (GEO)
Referee Observer: Sergei Zuev (RUS)
Slavia Praha – Feyenoord
Referee: Mattias Gestranius (FIN)
Assistant Referee 1: Jan-Peter Aravirta (FIN)
Assistant Referee 2: Mikko Alakare (FIN)
Fourth Official: Joni Hyytiä (FIN)
Referee Observer: Robert Malek (POL)
Maccabi Haifa – Union Berlin
Referee: Michal Ocenas (SVK)
Assistant Referee 1: Peter Bednar (SVK)
Assistant Referee 2: Daniel Polacek (SVK)
Fourth Official: Martin Dohal (SVK)
Referee Observer: Sergejus Slyva (LTU)
Lincoln Red Imps – FC Copenhagen
Referee: Helgi Jonsson (ISL)
Assistant Referee 1: Gylfi Sigurdsson (ISL)
Assistant Referee 2: Thordur Arnason (ISL)
Fourth Official: Vilhjalmur Thorarinsson (ISL)
Referee Observer: Salustia Chato Cipres (AND)
Slovan Bratislava – PAOK FC
Referee: Dennis Higler (NED)
Assistant Referee 1: Erwin Zeinstra (NED)
Assistant Referee 2: Mario Diks (NED)
Fourth Official: Sander van der Eijk (NED)
Referee Observer: Karel Vidlak (CZE)
NS Mura – Tottenham Hotspur
Referee: Antonio Nobre (POR)
Assistant Referee 1: Pedro Ribeiro (POR)
Assistant Referee 2: Nelson Pereira (POR)
Fourth Official: Fabio Oliveira (POR)
Referee Observer: Augustus Constantin (ROU)
Stade Rennais – Vitesse
Referee: Espen Eskas (NOR)
Assistant Referee 1: Kim Haglund (NOR)
Assistant Referee 2: Oystein Ytterland (NOR)
Fourth Official: Kristoffer Hagenes (NOR)
Referee Observer: Joao Ferreira (POR)
Qarabag FK – Omonia
Referee: Morten Krogh (DEN)
Assistant Referee 1: Niels Hog (DEN)
Assistant Referee 2: Steffen Bramsen (DEN)
Fourth Official: Jörgen Daugbjerg Burchardt (DEN)
Referee Observer: Erol Ersoy (TUR)
Maccabi Tel Aviv – LASK
Referee: Jerôme Brisard (FRA)
Assistant Referee 1: Benjamin Pages (FRA)
Assistant Referee 2: Erwan Finjean (FRA)
Fourth Official: Thomas Leonard (FRA)
Referee Observer: Domagoj Vuckov (CRO)
Anorthosis Famagusta – KAA Gent
Referee: Urs Schnyder (SUI)
Assistant Referee 1: Marco Zürcher (SUI)
Assistant Referee 2: Benjamin Zürcher (SUI)
Fourth Official: Alain Bieri (SUI)
Referee Observer: Pavle Radovanović (MNE)
AS Roma – Zorya Luhansk
Referee: Istvan Kovacs (ROU)
Assistant Referee 1: Vasile Marinescu (ROU)
Assistant Referee 2: Ovidiu Artene (ROU)
Fourth Official: Andrei Chivulete (ROU)
Referee Observer: Edgar Steinborn (GER)
Bodo Glimt – CSKA Sofia
Referee: Yigal Frid (ISR)
Assistant Referee 1: David Bitton (ISR)
Assistant Referee 2: Matityahu Yakobov (ISR)
Fourth Official: Liran Liany (ISR)
Referee Observer: Petteri Kari (FIN)
Randers FC – CFR Cluj
Referee: Donald Robertson (SCO)
Assistant Referee 1: Alan Mulvanny (SCO)
Assistant Referee 2: Calum Spence (SCO)
Fourth Official: David Munro (SCO)
Referee Observer: Alberto Undiano Mallenco (ESP)
FK Jablonec – AZ Alkmaar
Referee: Manuel Schüttengruber (AUT)
Assistant Referee 1: Roland Brandner (AUT)
Assistant Referee 2: Robert Steinacher (AUT)
Fourth Official: Rene Eisner (AUT)
Referee Observer: Gevorg Hovhannisyan (ARM)
Assistant Referee 1: Wayne McDonnell (IRL)
Assistant Referee 2: Darragh Keegan (IRL)
Fourth Official: Neil Doyle (IRL)
Referee Observer: Aleksandr Gvardis (RUS)
Kairat Almaty – FC Basel
Referee: Goga Kikacheishvili (GEO)
Assistant Referee 1: Davit Gabisonia (GEO)
Assistant Referee 2: Giorgi Elikashvili (GEO)
Fourth Official: Irakli Kvirikashvili (GEO)
Referee Observer: Sergei Zuev (RUS)
Slavia Praha – Feyenoord
Referee: Mattias Gestranius (FIN)
Assistant Referee 1: Jan-Peter Aravirta (FIN)
Assistant Referee 2: Mikko Alakare (FIN)
Fourth Official: Joni Hyytiä (FIN)
Referee Observer: Robert Malek (POL)
Maccabi Haifa – Union Berlin
Referee: Michal Ocenas (SVK)
Assistant Referee 1: Peter Bednar (SVK)
Assistant Referee 2: Daniel Polacek (SVK)
Fourth Official: Martin Dohal (SVK)
Referee Observer: Sergejus Slyva (LTU)
Lincoln Red Imps – FC Copenhagen
Referee: Helgi Jonsson (ISL)
Assistant Referee 1: Gylfi Sigurdsson (ISL)
Assistant Referee 2: Thordur Arnason (ISL)
Fourth Official: Vilhjalmur Thorarinsson (ISL)
Referee Observer: Salustia Chato Cipres (AND)
Slovan Bratislava – PAOK FC
Referee: Dennis Higler (NED)
Assistant Referee 1: Erwin Zeinstra (NED)
Assistant Referee 2: Mario Diks (NED)
Fourth Official: Sander van der Eijk (NED)
Referee Observer: Karel Vidlak (CZE)
NS Mura – Tottenham Hotspur
Referee: Antonio Nobre (POR)
Assistant Referee 1: Pedro Ribeiro (POR)
Assistant Referee 2: Nelson Pereira (POR)
Fourth Official: Fabio Oliveira (POR)
Referee Observer: Augustus Constantin (ROU)
Stade Rennais – Vitesse
Referee: Espen Eskas (NOR)
Assistant Referee 1: Kim Haglund (NOR)
Assistant Referee 2: Oystein Ytterland (NOR)
Fourth Official: Kristoffer Hagenes (NOR)
Referee Observer: Joao Ferreira (POR)
Qarabag FK – Omonia
Referee: Morten Krogh (DEN)
Assistant Referee 1: Niels Hog (DEN)
Assistant Referee 2: Steffen Bramsen (DEN)
Fourth Official: Jörgen Daugbjerg Burchardt (DEN)
Referee Observer: Erol Ersoy (TUR)
Maccabi Tel Aviv – LASK
Referee: Jerôme Brisard (FRA)
Assistant Referee 1: Benjamin Pages (FRA)
Assistant Referee 2: Erwan Finjean (FRA)
Fourth Official: Thomas Leonard (FRA)
Referee Observer: Domagoj Vuckov (CRO)
Anorthosis Famagusta – KAA Gent
Referee: Urs Schnyder (SUI)
Assistant Referee 1: Marco Zürcher (SUI)
Assistant Referee 2: Benjamin Zürcher (SUI)
Fourth Official: Alain Bieri (SUI)
Referee Observer: Pavle Radovanović (MNE)
AS Roma – Zorya Luhansk
Referee: Istvan Kovacs (ROU)
Assistant Referee 1: Vasile Marinescu (ROU)
Assistant Referee 2: Ovidiu Artene (ROU)
Fourth Official: Andrei Chivulete (ROU)
Referee Observer: Edgar Steinborn (GER)
Bodo Glimt – CSKA Sofia
Referee: Yigal Frid (ISR)
Assistant Referee 1: David Bitton (ISR)
Assistant Referee 2: Matityahu Yakobov (ISR)
Fourth Official: Liran Liany (ISR)
Referee Observer: Petteri Kari (FIN)
Randers FC – CFR Cluj
Referee: Donald Robertson (SCO)
Assistant Referee 1: Alan Mulvanny (SCO)
Assistant Referee 2: Calum Spence (SCO)
Fourth Official: David Munro (SCO)
Referee Observer: Alberto Undiano Mallenco (ESP)
FK Jablonec – AZ Alkmaar
Referee: Manuel Schüttengruber (AUT)
Assistant Referee 1: Roland Brandner (AUT)
Assistant Referee 2: Robert Steinacher (AUT)
Fourth Official: Rene Eisner (AUT)
Referee Observer: Gevorg Hovhannisyan (ARM)