KF Shkëndija – Nõmme KaljuReferee: Alain Bieri (SUI, photo)
Assistant Referee 1: Alain Heiniger (SUI)
Assistant Referee 2: Sertac Kurnazca (SUI)
Fourth Official: Stefan Horisberger (SUI)
Referee Observer: Miroslav Tulinger (CZE)
FC Saburtalo – Sheriff Tiraspol
Referee: Pavel Orel (CZE)
Assistant Referee 1: Petr Blažej (CZE)
Assistant Referee 2: Jiří Kříž (CZE)
Fourth Official: Petr Ardeleanu (CZE)
Referee Observer: Rune Pedersen (NOR)
Valletta FC – F91 Dudelange
Referee: Juri Frischer (EST)
Assistant Referee 1: Neeme Neemlaid (EST)
Assistant Referee 2: Veiko Mõtsnik (EST)
Fourth Official: Kristo Külljastinen (EST)
Referee Observer: Lucílio Batista (POR)
HB Tórshavn – HJK Helsinki
Referee: Geórgios Komínis (GRE)
Assistant Referee 1: Chrístos Akrívos (GRE)
Assistant Referee 2: Andréas Meidanás (GRE)
Fourth Official: Aristoménis Koutsiáftis (GRE)
Referee Observer: Sokol Jareci (ALB)
Crvena Zvezda – FK Sūduva
Referee: Ádám Farkas (HUN)
Assistant Referee 1: Péter Berettyán (HUN)
Assistant Referee 2: Balázs Szert (HUN)
Fourth Official: Péter Solymosi (HUN)
Referee Observer: Kóstas Kapitanís (CYP)
KF Feronikeli – The New Saints
Referee: Espen Eskås (NOR)
Assistant Referee 1: Øystein Ytterland (NOR)
Assistant Referee 2: Jon-Michael Knutsen (NOR)
Fourth Official: Kai Erik Steen (NOR)
Referee Observer: Sándor Piller (HUN)
Riga FC – Dundalk FC
Referee: Dimitar Mečkarovski (MKD)
Assistant Referee 1: Dejan Nedelkoski (MKD)
Assistant Referee 2: Goce Petreski (MKD)
Fourth Official: Konstantin Vlaho (MKD)
Referee Observer: Kristinn Jakobsson (ISL)
AIK – Ararat FC
Referee: Robert Hennessy (IRL)
Assistant Referee 1: Allen Lynch (IRL)
Assistant Referee 2: Dermot Broughton (IRL)
Fourth Official: Damien McGraith (IRL)
Referee Observer: Ichko Lozev (BUL)
Qarabağ – Partizani
Referee: Dumitru Muntean (MDA)
Assistant Referee 1: Vladislav Lifciu (MDA)
Assistant Referee 2: Andrei Bodean (MDA)
Fourth Official: Alexandru Tean (MDA)
Referee Observer: William Young (SCO)
Rosenborg BK – Linfield FC
Referee: Enea Jorgji (ALB)
Assistant Referee 1: Denis Rexha (ALB)
Assistant Referee 2: Rudin Preça (ALB)
Fourth Official: Kridens Meta (ALB)
Referee Observer: Vlado Svilokos (CRO)
PFC Ludogorets – Ferencvárosi TC
Referee: Donatas Rumšas (LTU)
Assistant Referee 1: Dovydas Sužiedėlis (LTU)
Assistant Referee 2: Vytis Snarskis (LTU)
Fourth Official: Robertas Valikonis (LTU)
Referee Observer: Kevin Azzopardi (MLT)
CFR Cluj – FC Astana
Referee: Alexander Harkam (AUT)
Assistant Referee 1: Andreas Witschnigg (AUT)
Assistant Referee 2: Andreas Staudinger (AUT)
Fourth Official: Christian-Petru Ciochirca (AUT)
Referee Observer: Levan Paniashvili (GEO)
GKS Piast Gliwice – Bate Borisov
Referee: Antti Munukka (FIN)
Assistant Referee 1: Jukka Honkanen (FIN)
Assistant Referee 2: Riku Vihreävuori (FIN)
Fourth Official: Mohammed Al-Emara (FIN)
Referee Observer: Drago Kos (SVN)
FK Sutjeska – Slovan Bratislava
Referee: Horațiu Feșnic (ROU)
Assistant Referee 1: Alexandru Cerei (ROU)
Assistant Referee 2: Mihai Marica (ROU)
Fourth Official: Marius Avram (ROU)
Referee Observer: Elmir Pilav (BIH)
NK Maribor – Valur
Referee: João Pinheiro (POR)
Assistant Referee 1: Rui Tavares (POR)
Assistant Referee 2: Bruno Rodrigues (POR)
Fourth Official: Cláudio Pereira (POR)
Referee Observer: Luciano Luci (ITA)
Celtic FC – FK Sarajevo
Referee: Alain Durieux (LUX)
Assistant Referee 1: Gilles Becker (LUX)
Assistant Referee 2: Claude Ries (LUX)
Fourth Official: Laurent Kopriwa (LUX)
Referee Observer: Juan Fernández Marín (ESP)
