SL Benfica – Celtic FC
Referee: Nikola Dabanović MNE (photo)
Assistant Referee 1: Srdjan Jovanović MNE
Assistant Referee 2: Vladan Todorović MNE
Fourth Official: Miloš Savović MNE
VAR: Pol van Boekel NED
AVAR: Fedayi San SUI
Referee Observer: Robert Schörgenhofer AUT
SCU Torreense – Sunderland AFC
Referee: Enea Jorgji ALB
Assistant Referee 1: Denis Rexha ALB
Assistant Referee 2: Ridiger Çokaj ALB
Fourth Official: Juxhin Xhaja ALB
VAR: Daniele Doveri ITA
AVAR: Albert Doda ALB
Referee Observer: Kenneth Clark SCO
Olympique Lyonnais – Crystal Palace
Referee: João Pinheiro POR
Assistant Referee 1: Luciano Maia POR
Assistant Referee 2: Hugo Marques POR
Fourth Official: David Silva POR
VAR: Tiago Martins POR
AVAR: César Soto Grado ESP
Referee Observer: Yevhenii Aranovskiy UKR
AZ Alkmaar – Hapoel Beer Sheva
Referee: Radoslav Gidzhenov BUL
Assistant Referee 1: Miroslav Maksimov BUL
Assistant Referee 2: Petar Mitrev BUL
Fourth Official: Nikola Popov BUL
VAR: Lukas Fähndrich SUI
AVAR: Tomasz Kwiatkowski POL
Referee Observer: Knut Kircher GER
Union St. Gilloise – Real Sociedad
Referee: Goga Kikacheishvili GEO
Assistant Referee 1: Davit Akhvlediani GEO
Assistant Referee 2: Davit Gabisonia GEO
Fourth Official: Bakari Bregadze GEO
VAR: Darren England ENG
AVAR: Aleko Aptsiauri GEO
Referee Observer: Daniele Orsato ITA
RB Salzburg – AC Milan
Referee: Horațiu Feșnic ROU
Assistant Referee 1: Alexandru Cerei ROU
Assistant Referee 2: Alexandru Corb ROU
Fourth Official: Florin Andrei ROU
VAR: Cătălin Popa ROU
AVAR: Carlos Del Cerro Grande ESP
Referee Observer: Fredy Fautrel FRA
Sparta Praha – Lillestrom SK
Referee: Martin Matoša SVN
Assistant Referee 1: Matej Žunič SVN
Assistant Referee 2: Aleksandar Kasapovič SVN
Fourth Official: Mateo Tozan SVN
VAR: Asmir Sagrković SVN
AVAR: Alen Borošak SVN
Referee Observer: Michael Koukoulakis GRE
Lech Poznan – Bayer Leverkusen
Referee: Miloš Milanović SRB
Assistant Referee 1: Milan Pašajlić SRB
Assistant Referee 2: Svetozar Živin SRB
Fourth Official: Novak Simović SRB
VAR: Momčilo Marković SRB
AVAR Pavle Tomić SRB
Referee Observer: Cyril Zimmermann SUI
NK Celje – Omonia Nicosia
Referee: Elchin Masiyev AZE
Assistant Referee 1: Elshad Abdullayev AZE
Assistant Referee 2: Parvin Talibov AZE
Fourth Official: Farid Hajiyev AZE
VAR: Luca Pairetto ITA
AVAR: Nicat Ismayilli AZE
Referee Observer: Nenad Djokić SRB
Olympique de Marseille – Olympiacos FC
Referee: Michael Oliver ENG
Assistant Referee 1: Stuart Burt ENG
Assistant Referee 2: James Mainwaring ENG
Fourth Official: Andrew Madley ENG
VAR: Andrew Dallas SCO
AVAR: Dennis Higler NED
Referee Observer: Martin Hansson SWE
Ferencvarosi TC – Viktoria Plzen
Referee: Damian Sylwestrzak POL
Assistant Referee 1: Paweł Sokolnicki POL
Assistant Referee 2: Adam Karasewicz POL
Fourth Official: Marcin Kochanek POL
VAR: Piotr Lasyk POL
AVAR: Pawel Pskit POL
Referee Observer: Shmuel Shteif ISR
GNK Dinamo – RSC Anderlecht
Referee: Orel Grinfeeld ISR
Assistant Referee 1: Roy Hassan ISR
Assistant Referee 2: Idan Yarkoni ISR
Fourth Official: Snir Levy ISR
VAR: Daniel Natan ISR
AVAR: Eli Hacmon ISR
Referee Observer: Christos Nicolaides CYP
Stade Rennais – OFI Crete
Referee: Andrea Colombo ITA
Assistant Referee 1: Filippo Meli ITA
Assistant Referee 2: Valerio Colarossi ITA
Fourth Official: Simone Sozza ITA
VAR: Marco Di Bello ITA
AVAR: Kristoffer Hagenes NOR
Referee Observer: Lassin Isaksen FRO
AFC Bournemouth – Sturm Graz
Referee: Jérôme Brisard FRA
Assistant Referee 1: Alexis Auger FRA
Assistant Referee 2: Aurélien Berthomieu FRA
Fourth Official: Eric Wattellier FRA
VAR: Willy Delajod FRA
AVAR: Mathieu Vernice FRA
Referee Observer: Bernardino González Vázquez ESP
Jagiellonia Bialystok – Ararat Armenia
Referee: Anastasios Papapetrou GRE
Assistant Referee 1: Tryfon Petropoulos GRE
Assistant Referee 2: Andreas Fotopoulos GRE
Fourth Official: Fotios Polychronis GRE
VAR: Angelos Evangelou GRE
AVAR: Ioannis Papadopoulos GRE
Referee Observer: Vladimir Antonov MDA
Celta de Vigo – Juventus FC
Referee: Sander van der Eijk NED
Assistant Referee 1: Rens Bluemink NED
Assistant Referee 2: Stefan De Groot NED
Fourth Official: Allard Lindhout NED
VAR: Michael Salisbury ENG
AVAR: Richard Martens NED
Referee Observer: Emil Bozinovski MKD
TSG Hoffenheim – Besiktas
Referee: Lawrence Visser BEL
Assistant Referee 1: Ruben Wyns BEL
Assistant Referee 2: Michele Seeldraeyers BEL
Fourth Official: Kevin Van Damme BEL
VAR: Bram Van Driessche BEL
AVAR: Stuart Attwell ENG
Referee Observer: Gylfi Orrason ISL
NEC – Levski Sofia
Referee: Aliyar Aghayev AZE
Assistant Referee 1: Zeynal Zeynalov AZE
Assistant Referee 2: Akif Amirali AZE
Fourth Official: Ingilab Mammadov AZE
VAR: Ivan Bebek CRO
Referee Observer: Iain Robertson Brines SCO