Fiorentina – RFS
Referee: Pavel Orel (CZE, photo)
Assistant Referee 1: Ivo Nadvornik (CZE)
Assistant Referee 2: Matěj Vlček (CZE)
Fourth Official: Miroslav Zelinka (CZE)
Referee Observer: Martin Hansson (SWE)
Hearths – Istanbul Başakşehir
Referee: Krzysztof Jakubik (POL)
Assistant Referee 1: Arkadiusz Wojcik (POL)
Assistant Referee 2: Tomasz Niemirowski (POL)
Fourth Official: Damian Kos (POL)
Referee Observer: Jouni Hyytiä (FIN)
Anderlecht – Silkeborg
Referee: Istvan Vad (HUN)
Assistant Referee 1: Vencel Toth (HUN)
Assistant Referee 2: Istvan Albert (HUN)
Fourth Official: Sandor Szabo (HUN)
Referee Observer: Bariş Şimşek (TUR)
Austria Wien – Hapoel Beer Sheva
Referee: Horatiu Fesnic (ROU)
Assistant Referee 1: Valentin Avram (ROU)
Assistant Referee 2: Alexandru Cerei (ROU)
Fourth Official: Sebastian Coltescu (ROU)
Referee Observer: Edward Foley (IRL)
Villarreal – Lech
Referee: Ali Palabiyik (TUR)
Assistant Referee 1: Ceyhun Sesigüzel (TUR)
Assistant Referee 2: Serkan Olguncan (TUR)
Fourth Official: Kadir Saglam (TUR)
Referee Observer: João Ferreira (POR)
Slovacko – Partizan
Referee: Robert Harvey (IRL)
Assistant Referee 1: Robert Clarke (IRL)
Assistant Referee 2: Wayne McDonnell (IRL)
Fourth Official: Robert Hennessy (IRL)
Referee Observer: Karen Nalbandyan (ARM)
OGC Nice – FC Köln
Referee: Luis Godinho (POR)
Assistant Referee 1: Rui Teixeira (POR)
Assistant Referee 2: Pedro Almeida (POR)
Fourth Official: Gustavo Correia (POR)
Referee Observer: Vladimir Petrov (UKR)
Ballkani – CFR Cluj
Referee: Urs Schnyder (SUI)
Assistant Referee 1: Marco Zürcher (SUI)
Assistant Referee 2: Benjamin Zürcher (SUI)
Fourth Official: Sven Wolfensberger (SUI)
Referee Observer: Uno Tutk (EST)
West Ham – FCSB
Referee: Benoît Bastien (FRA)
Assistant Referee 1: Hicham Zakrani (FRA)
Assistant Referee 2: Aurelien Berthomieu (FRA)
Fourth Official: Jeremie Pignard (FRA)
Referee Observer: Manuel Diaz Vega (ESP)
Sivasspor – Slavia Praha
Referee: Fran Jović (CRO)
Assistant Referee 1: Hrvoje Radić (CRO)
Assistant Referee 2: Luka Pusić (CRO)
Fourth Official: Mario Zebec (CRO)
Referee Observer: Edgar Steinborn (GER)
Molde – KAA Gent
Referee: Petri Viljanen (FIN)
Assistant Referee 1: Mika Lamppu (FIN)
Assistant Referee 2: Jan-Peter Aravirta (FIN)
Fourth Official: Joni Hyytiä (FIN)
Referee Observer: Fritz Stuchlik (AUT)
Shamrock Rovers – Djurgardens IF
Referee: Ivar Kristjansson (ISL)
Assistant Referee 1: Birkir Sigurdarson (ISL)
Assistant Referee 2: Johann Gudmundsson (ISL)
Fourth Official: Thorvaldur Arnason (ISL)
Referee Observer: Kenneth Clark (SCO)
Basel – Pyunik
Referee: Juan Martinez Munuera (ESP)
Assistant Referee 1: Diego Barbero (ESP)
Assistant Referee 2: Miguel Martinez (ESP)
Fourth Official: Pablo Gonzalez Fuertes (ESP)
Referee Observer: Jon Skjervold (NOR)
Slovan Bratislava – Zalgiris
Referee: Rauf Jabarov (AZE)
Assistant Referee 1: Namik Huseynov (AZE)
Assistant Referee 2: Yusifov Javanshir (AZE)
Fourth Official: Farid Hajiyev (AZE)
Referee Observer: Frank De Bleeckere (BEL)
Vaduz – Apollon Limassol
Referee: Dumitri Muntean (MDA)
Assistant Referee 1: Vlad Lifciu (MDA)
Assistant Referee 2: Andrei Bodean (MDA)
Fourth Official: Veaceslav Banari (MDA)
Referee Observer: Neale Barry (ENG)
Dnipro – AZ
Referee: Yigal Frid (ISR)
Assistant Referee 1: Matityahu Yakobov (ISR)
Assistant Referee 2: Omer Barbiro (ISR)
Fourth Official: Shalom Avraham (ISR)
Referee Observer: Dejan Filipović (SRB)