Riga FC – Gil Vicente
Referee: Jakob Kehlet (DEN, photo)
Assistant Referee 1: Lars Hummelgaard (DEN)
Assistant Referee 2: Victor Skytte (DEN)
Fourth Official: Morten Krogh (DEN)
Referee Observer: Iain Robertson Brines (SCO)
Viborg FF – B36 Torshavn
Referee: Henrik Nalbandyan (ARM)
Assistant Referee 1: Mesrop Ghazaryan (ARM)
Assistant Referee 2: Sargis Hovhannisyan (ARM)
Fourth Official: Zaven Hovhannisyan (ARM)
Referee Observer: Jan Wegereef (NED)
Wolfsberger AC – Gzira United
Referee: Urs Schnyder (SUI)
Assistant Referee 1: Marco Zürcher (SUI)
Assistant Referee 2: Benjamin Zürcher (SUI)
Fourth Official: Sven Wolfensberger (SUI)
Referee Observer: John Ferry (NIR)
Dunajska Streda – FCSB
Referee: Rade Obrenovič (SVN)
Assistant Referee 1: Jure Praprotnik (SVN)
Assistant Referee 2: Grega Kordež (SVN)
Fourth Official: Asmir Sagrkovič (SVN)
Referee Observer: Stephane Lannoy (FRA)
RFS – Hibernians
Referee: Genc Nuza (KOS)
Assistant Referee 1: Fatlum Berisha (KOS)
Assistant Referee 2: Bujar Selimaj (KOS)
Fourth Official: Mervan Bejtullahu (KOS)
Referee Observer: Stephen Lodge (ENG)
KuPS Kuopio – BSC Young Boys
Referee: Gergő Bogar (HUN)
Assistant Referee 1: Balazs Szalai (HUN)
Assistant Referee 2: Theodoros Georgiou (HUN)
Fourth Official: Ferenc Karako (HUN)
Referee Observer: Kyros Vassaras (GRE)
Spartak Trnava – Rakow Czestochowa
Referee: Igor Pajač (CRO)
Assistant Referee 1: Ivan Mihalj (CRO)
Assistant Referee 2: Kruno Šarić (CRO)
Fourth Official: Ante Čulina (CRO)
Referee Observer: Georgios Bíkas (GRE)
Paide Linnameeskond – RSC Anderlecht
Referee: David Fuxman (ISR)
Assistant Referee 1: Matityahu Yakobov (ISR)
Assistant Referee 2: Omer Barbiro (ISR)
Fourth Official: Aviad Shiloach (ISR)
Referee Observer: Thomas Einwaller (AUT)
Sachcior Salihorsk – CFR Cluj
Referee: Ioannis Papadopoulos (GRE)
Assistant Referee 1: Konstantinos Nikolaidis (GRE)
Assistant Referee 2: Vasilios Nikolakakis (GRE)
Fourth Official: Athanasios Tzilos (GRE)
Referee Observer: Jorn-West Larsen (DEN)
AIK – Skendija
Referee: Bram Van Driessche (BEL)
Assistant Referee 1: Kevin Monteny (BEL)
Assistant Referee 2: Romain Devillers (BEL)
Fourth Official: Kevin Van Damme (BEL)
Referee Observer: Leslie Irvine (NIR)
Viking FK – Sligo Rovers
Referee: Radu Petrescu (ROU)
Assistant Referee 1: Radu Ghinguleac (ROU)
Assistant Referee 2: Mircea Grigoriu (ROU)
Fourth Official: Marcel Bîrsan (ROU)
Referee Observer: Dimitar Mečkarovski (MKD)
Lillestrom SK – Royal Antwerp
Referee: Daniel Stefanski (POL)
Assistant Referee 1: Dawid Golis (POL)
Assistant Referee 2: Michal Obukowicz (POL)
Fourth Official: Damian Sylwestrzak (POL)
Referee Observer: Carlos Clos Gomez (ESP)
CSKA Sofia – St. Patrick’s Athletic
Referee: Manuel Schüttengruber (AUT)
Assistant Referee 1: Roland Brandner (AUT)
Assistant Referee 2: Andreas Rothmann (AUT)
Fourth Official: Stefan Ebner (AUT)
Referee Observer: Gylfi Orrason (ISL)
Apoel – Qyzyljar SK
Referee: Erik Lambrechts (BEL)
Assistant Referee 1: Jo De Weirdt (BEL)
Assistant Referee 2: Mathias Hillaert (BEL)
Fourth Official: Jasper Vergoote (BEL)
Referee Observer: Alain Hamer (LUX)
Maccabi Tel Aviv – Aris Thessaloniki
Referee: Dennis Higler (NED)
Assistant Referee 1: Mario Diks (NED)
Assistant Referee 2: Rogier Honig (NED)
Fourth Official: Joey Kooij (NED)
Referee Observer: Robert Malek (POL)
Molde FK – Kisvarda FC
Referee: Igor Stojčevski (MKD)
Assistant Referee 1: Dejan Kostadinov (MKD)
Assistant Referee 2: Goce Petreski (MKD)
Fourth Official: Marjan Dejanoski (MKD)
Referee Observer: Boško Jovanetić (SRB)
Neftci PFK – Rapid Wien
Referee: Dario Bel (CRO)
Assistant Referee 1: Marjan Tomas (CRO)
Assistant Referee 2: Kristijan Novosel (CRO)
Fourth Official: Patrik Kolarić (CRO)
Referee Observer: Martin Ingvarsson (SWE)
Slavia Praha – Panathinaikos
Referee: Ruddy Buquet (FRA)
Assistant Referee 1: Aurelien Drouet (FRA)
Assistant Referee 2: Guillaume Debart (FRA)
Fourth Official: Bastien Dechepy (FRA)
Referee Observer: Edward Foley (IRL)
Zorya Luhansk – Universitatea Craiova
Referee: Georgi Davidov (BUL)
Assistant Referee 1: Deniz Sokolov (BUL)
Assistant Referee 2: Miroslav Ivanov (BUL)
Fourth Official: Dragomir Draganov (BUL)
Referee Observer: Vladimir Medved (SVK)
KF Ballkani – KI Klaksvík
Referee: Espen Eskas (NOR)
Assistant Referee 1: Jan Engan (NOR)
Assistant Referee 2: Isaak Bashevkin (NOR)
Fourth Official: Kristoffer Hagenes (NOR)
Referee Observer: Alieh Chykun (BLR)
FC Lugano – Hapoel Beer Sheva
Referee: Michael Fabbri (ITA)
Assistant Referee 1: Ciro Carbone (ITA)
Assistant Referee 2: Niccolo Pagliardini (ITA)
Fourth Official: Marco Piccinini (ITA)
Referee Observer: Augustus Constantin (ROU)
Hamrun Spartans – Levski Sofia
Referee: Willy Delajod (FRA)
Assistant Referee 1: Erwan Finjean (FRA)
Assistant Referee 2: Philippe Jeanne (FRA)
Fourth Official: Thomas Léonard (FRA)
Referee Observer: Lucilio Batista (POR)
Čukarički – Twente
Referee: Harald Lechner (AUT)
Assistant Referee 1: Andreas Heidenreich (AUT)
Assistant Referee 2: Maximilian Kolbitsch (AUT)
Fourth Official: Markus Hameter (AUT)
Referee Observer: Michail Argyrou (CYP)
FC Vaduz – Konyaspor
Referee: Manfredas Lukjančukas (LTU)
Assistant Referee 1: Vytenis Kazlauskas (LTU)
Assistant Referee 2: Gevork Arakelian (LTU)
Fourth Official: Mindaugas Jackus (LTU)
Referee Observer: Laurent Duhamel (FRA)
Sepsi Sfântu Gheorghe – Djurgardens IF
Referee: Pawel Raczkowski (POL)
Assistant Referee 1: Radoslaw Siejka (POL)
Assistant Referee 2: Adam Kupsik (POL)
Fourth Official: Piotr Lasyk (POL)
Referee Observer: Salustia Cipres (AND)
Brondby IF – FC Basel
Referee: Filip Glova (SVK)
Assistant Referee 1: Peter Bednar (SVK)
Assistant Referee 2: Daniel Polacek (SVK)
Fourth Official: Michal Očenaš (SVK)
Referee Observer: Bernardino Gonzalez Vazquez (ESP)
MOL Fehervar – Petrocub Hîncești
Referee: Vilhjálmur Alvar Þórarinsson (ISL)
Assistant Referee 1: Gylfi Már Sigurðsson (ISL)
Assistant Referee 2: Birkir Sigurdarson (ISL)
Fourth Official: Helgi Jonasson (ISL)
Referee Observer: Jan Carlsen (DEN)
Vikingur Reykjavík – Lech Poznan
Referee: Juxhin Xhaja (ALB)
Assistant Referee 1: Dojando Myftari (ALB)
Assistant Referee 2: Nertil Bregasi (ALB)
Fourth Official: Kreshnik Cjapi (ALB)
Referee Observer: Frank De Bleeckere (BEL)
Breidablik – Istanbul Basaksehir
Referee: Petri Viljanen (FIN)
Assistant Referee 1: Mika Lamppu (FIN)
Assistant Referee 2: Mikko Alakare (FIN)
Fourth Official: Joni Hyytiä (FIN)
Referee Observer: Stefan Messner (AUT)
HSK Zrinjski – Tobyl FK
Referee: Antonio Nobre (POR)
Assistant Referee 1: Pedro Ribeiro (POR)
Assistant Referee 2: Pedro Martins (POR)
Fourth Official: Andre Narciso (POR)
Referee Observer: Stavros Tritsonis (GRE)
Hajduk Split – Vitoria SC
Referee: Mohammed Al-Hakim (SWE)
Assistant Referee 1: Fredrik Klyver (SWE)
Assistant Referee 2: Robin Wilde (SWE)
Fourth Official: Bojan Pandzic (SWE)
Referee Observer: Pascal Garibian (FRA)
Dundee United – AZ Alkmaar
Referee: Vitor Ferreira (POR)
Assistant Referee 1: Paulo Bras (POR)
Assistant Referee 2: Luis Costa (POR)
Fourth Official: Bruno Costa (POR)
Referee Observer: Kristinn Jakobsson (ISL)