CFR Cluj – Sivasspor
Referee: Allard Lindhout (NED, photo)
Assistant Referee 1: Mario Diks (NED)
Assistant Referee 2: Erwin Zeinstra (NED)
Fourth Official: Joey Kooij (NED)
Referee Observer: Milorad Mažić (SRB)
Slavia Praha – Ballkani
Referee: Willy Delajod (FRA)
Assistant Referee 1: Christophe Finjean (FRA)
Assistant Referee 2: Philippe Jeanne (FRA)
Fourth Official: Thomas Leonard (FRA)
Referee Observer: Juan Fernandez Marin (ESP)
Djurgardens – Molde
Referee: Gergo Bogar (HUN)
Assistant Referee 1: Balazs Szalai (HUN)
Assistant Referee 2: Theodoros Georgiou (HUN)
Fourth Official: Mihaly Kapraly (HUN)
Referee Observer: Haim Jakov (ISR)
KAA Gent – Shamrock Rovers
Referee: Visar Kastrati (KOS)
Assistant Referee 1: Besnik Morina (KOS)
Assistant Referee 2: Granit Hyseni (KOS)
Fourth Official: Genc Nuza (KOS)
Referee Observer: Rene Temmink (NED)
Zalgiris – Basel
Referee: Iwan Griffith (WAL)
Assistant Referee 1: Daniel Beckett (WAL)
Assistant Referee 2: Johnathon Bryant (WAL)
Fourth Official: Bryn Markham-Jones (WAL)
Referee Observer: Jorn-West Larsen (DEN)
Pyunik – Slovan Bratislava
Referee: Gal Leibovitz (ISR)
Assistant Referee 1: Yossi Babayoff (ISR)
Assistant Referee 2: Rostislav Talis (ISR)
Fourth Official: Nael Odeh (ISR)
Referee Observer: Lucilio Batista (POR)
Apollon Limassol – Dnipro
Referee: Adam Farkas (HUN)
Assistant Referee 1: Balazs Szert (HUN)
Assistant Referee 2: Peter Garai (HUN)
Fourth Official: Bence Csonka (HUN)
Referee Observer: Ladislav Gadosi (SVK)
AZ – Vaduz
Referee: Nicholas Walsh (SCO)
Assistant Referee 1: Graeme Stewart (SCO)
Assistant Referee 2: Calum Spence (SCO)
Fourth Official: Alan Muir (SCO)
Referee Observer: Niklas Lidarenda (FRO)
RFS – Heart of Midlothian
Referee: Aleksandar Stavrev (MKD)
Assistant Referee 1: Dejan Kostadinov (MKD)
Assistant Referee 2: Goce Petreski (MKD)
Fourth Official: Jovan Kachevski (MKD)
Referee Observer: Shmuel Shteif (ISR)
Istanbul Başakşehir – Fiorentina
Referee: Guillermo Cuadra Fernandez (ESP)
Assistant Referee 1: Guadalupe Porras Ayuso (ESP)
Assistant Referee 2: Jose Garrido (ESP)
Fourth Official: Miguel Ortiz (ESP)
Referee Observer: Pavel Saliy (KAZ)
Hapoel Beer Sheva – Villarreal
Referee: William Collum (SCO)
Assistant Referee 1: David McGeachie (SCO)
Assistant Referee 2: Francis Connor (SCO)
Fourth Official: David Dickinson (SCO)
Referee Observer: Michal Benes (CZE)
Lech – Austria Wien
Referee: Peter Kjaergaard (DEN)
Assistant Referee 1: Dennis Rasmussen (DEN)
Assistant Referee 2: Ole Kronlykke (DEN)
Fourth Official: Jakob Sundberg (DEN)
Referee Observer: Georgios Bikas (GRE)
FCSB – Anderlecht
Referee: Sebastian Gishamer (AUT)
Assistant Referee 1: Roland Riedel (AUT)
Assistant Referee 2: Santino Schreiner (AUT)
Fourth Official: Christopher Jaeger (AUT)
Referee Observer: Fredy Fautrel (FRA)
Silkeborg – West Ham
Referee: Fabio Verissimo (POR)
Assistant Referee 1: Pedro Martins (POR)
Assistant Referee 2: Luis Campos (POR)
Fourth Official: Miguel Nogueira (POR)
Referee Observer: Gunnar Jonsson (ISL)
Partizan – OGC Nice
Referee: Andrew Madley (ENG)
Assistant Referee 1: Daniel Cook (ENG)
Assistant Referee 2: Neil Davies (ENG)
Fourth Official: John Brooks (ENG)
Referee Observer: Andrejs Sipailo (LVA)
FC Köln – Slovacko
Referee: Yevhenii Aranovskyi (UKR)
Assistant Referee 1: Viktor Matyash (UKR)
Assistant Referee 2: Valentyn Kutsev (UKR)
Fourth Official: Yaroslav Kozyk (UKR)
Referee Observer: Domagoj Vučkov (CRO)