Lincoln Red Imps – CS Fola Esch
Referee: Ian McNabb (NIR, photo)
Assistant Referee 1: Gareth Eakin (NIR)
Assistant Referee 2: Paul Robinson (NIR)
Fourth Official: Jamie Robinson (NIR)
Referee Observer: Nuno Castro (POR)
Riga FC – Malmö FF
Referee: Gergö Bogar (HUN)
Assistant Referee 1: Istvan Albert (HUN)
Assistant Referee 2: Balazs Szalai (HUN)
Fourth Official: Sándor Ando-Szabo (HUN)
Referee Observer: Augustus Constantin (ROU)
Hibernians FC – Flora Tallinn
Referee: Manfredas Lukjančukas (LTU)
Assistant Referee 1: Aleksandr Radiuš (LTU)
Assistant Referee 2: Vytis Snarskis (LTU)
Fourth Official: Jurij Paškovskij (LTU)
Referee Observer: Stefano Podeschi (SMR)
Sheriff Tiraspol – KF Teuta
Referee: Morten Krogh (DEN)
Assistant Referee 1: Jesper Dahl (DEN)
Assistant Referee 2: Steffen Bramsen (DEN)
Fourth Official: Jens Maae (DEN)
Referee Observer: Karen Nalbandyan (ARM)
Borac Banja Luka – CFR Cluj
Referee: Urs Schnyder (SUI)
Assistant Referee 1: Jan Köbeli (SUI)
Assistant Referee 2: Remy Zgraggen (SUI)
Fourth Official: Stefan Horisberger (SUI)
Referee Observer: Draženko Kovačić (CRO)
NŠ Mura – KF Shkëndija
Referee: Marcel Bîrsan (ROU)
Assistant Referee 1: Valentin Avram (ROU)
Assistant Referee 2: Mihai Marica (ROU)
Fourth Official: Iulian Dima (ROU)
Referee Observer: David Malcolm (NIR)
FC Prishtina – Ferencvarosi TC
Referee: Matthew De Gabriele (MLT)
Assistant Referee 1: Jurgen Spiteri (MLT)
Assistant Referee 2: Mitchell Scerri (MLT)
Fourth Official: Malcolm Spiteri (MLT)
Referee Observer: Uno Tutk (EST)
Budućnost Podgorica – HJK Helsinki
Referee: Dragomir Draganov (BUL)
Assistant Referee 1: Martin Venev (BUL)
Assistant Referee 2: Hristo Hadzhiyski (BUL)
Fourth Official: Georgi Dimitrov (BUL)
Referee Observer: Emil Božinovski (MKD)
Linfield FC – Žalgiris Vilnius
Referee: Laurent Kopriwa (LUX)
Assistant Referee 1: Daniel Da Costa (LUX)
Assistant Referee 2: Claude Ries (LUX)
Fourth Official: Ricardo Fernandes Morais (LUX)
Referee Observer: Edward Foley (IRL)
Shamrock Rovers – Slovan Bratislava
Referee: Mario Zebec (CRO)
Assistant Referee 1: Borut Križarić (CRO)
Assistant Referee 2: Vedran Djurak (CRO)
Fourth Official: Fran Jović (CRO)
Referee Observer: Michal Beneš (CZE)
Šachcior Salihorsk – PFC Ludogorets
Referee: Arda Kardeşler (TUR)
Assistant Referee 1: Kerem Ersoy (TUR)
Assistant Referee 2: Ali Ögel (TUR)
Fourth Official: Bahattin Şimşek (TUR)
Referee Observer: Juan Fernández Marín (ESP)
Valur – GNK Dinamo
Referee: Zaven Hovhannisyan (ARM)
Assistant Referee 1: Mesrop Ghazaryan (ARM)
Assistant Referee 2: Atom Sevgulyan (ARM)
Fourth Official: Henrik Nalbandyan (ARM)
Referee Observer: Jon Skjervold (NOR)
Qaırat Almaty – Maccabi Haifa
Referee: Viktor Kopiyevsky (UKR)
Assistant Referee 1: Viktor Matyash (UKR)
Assistant Referee 2: Oleksandr Zhukov (UKR)
Fourth Official: Mykola Balakin (UKR)
Referee Observer: Asim Khudiyev (AZE)
Alashkert FC – Connah's Quay Nomads
Referee: Ondřej Pechanec (CZE)
Assistant Referee 1: Petr Caletka (CZE)
Assistant Referee 2: Adam Horák (CZE)
Fourth Official: Pavel Orel (CZE)
Referee Observer: Matteo Trefoloni (ITA)
Neftçi PFK – Dinamo Tbilisi
Referee: Dumitru Muntean (MDA)
Assistant Referee 1: Vladislav Lifciu (MDA)
Assistant Referee 2: Vadim Vicol (MDA)
Fourth Official: Gabriel Tupicica (MDA)
Referee Observer: Aleksandr Gvardis (RUS)
Legia Warszawa – Bodo Glimt
Referee: Aristotelis Diamantopoulos (GRE)
Assistant Referee 1: Tryfon Petropoulos (GRE)
Assistant Referee 2: Reinhard Buxbaum (GRE)
Fourth Official: Georgios Tzovaras (GRE)
Referee Observer: Fritz Stuchlik (AUT)