Bodo Glimt – Arsenal
Referee: Irfan Peljto (BIH, photo)
Assistant Referee 1: Davor Beljo (BIH)
Assistant Referee 2: Damir Lazić (BIH)
Fourth Official: Admir Šehović (BIH)
VAR: Marco Guida (ITA)
AVAR: Fabio Maresca (ITA)
Referee Observer: Kenneth Clark (SCO)
Feyenoord – Midtjylland
Referee: Rade Obrenovič (SVN)
Assistant Referee 1: Jure Praprotnik (SVN)
Assistant Referee 2: Grega Kordez (SVN)
Fourth Official: Asmir Sagrković (SVN)
VAR: Nejc Kajtazovic (SVN)
AVAR: Matej Jug (SVN)
Referee Observer: Edgar Steinborn (GER)
Dynamo Kyiv – Rennes
Referee: Serdar Gözübüyük (NED)
Assistant Referee 1: Joost van Zuilen (NED)
Assistant Referee 2: Johan Balder (NED)
Fourth Official: Sander van der Eijk (NED)
VAR: Jeroen Manschot (NED)
AVAR: Ingmar Oostrom (NED)
Referee Observer: Andreas Schluchter (SUI)
AEK Larnaca – Fenerbahce
Referee: Pawel Raczkowski (POL)
Assistant Referee 1: Radoslaw Siejka (POL)
Assistant Referee 2: Adam Kupsik (POL)
Fourth Official: Pawel Malec (POL)
VAR: Piotr Lasyk (POL)
AVAR: Pawel Pskit (POL)
Referee Observer: David Malcom (NIR)
Betis – Roma
Referee: Anastasios Sdiropoulos (GRE)
Assistant Referee 1: Polychronis Kostaras (GRE)
Assistant Referee 2: Lazaros Dimitriadis (GRE)
Fourth Official: Aristotelis Diamantopoulos (GRE)
VAR: Angelos Evangelou (GRE)
AVAR: Dennis Higler (NED)
Referee Observer: Neale Barry (ENG)
St. Gilloise – Braga
Referee: Aliyar Aghayev (AZE)
Assistant Referee 1: Zeynal Zeynalov (AZE)
Assistant Referee 2: Akif Amirali (AZE)
Fourth Official: Elchin Masiyev (AZE)
VAR: Abdulkadir Bitigen (TUR)
AVAR: Mete Kalkavan (TUR)
Referee Observer: Rune Pedersen (NOR)
Nantes – Freiburg
Referee: Horatiu Fesnic (ROU)
Assistant Referee 1: Valentin Avram (ROU)
Assistant Referee 2: Alexandru Cerei (ROU)
Fourth Official: Sebastian Colţescu (ROU)
VAR: Michael Fabbri (ITA)
AVAR: Ovidiu Haţegan (ROU)
Referee Observer: João Ferreira (POR)
Qarabag – Olympiakos
Referee: Craig Pawson (ENG)
Assistant Referee 1: Lee Betts (ENG)
Assistant Referee 2: Ian Hussin (ENG)
Fourth Official: John Brooks (ENG)
VAR: Darren England (ENG)
AVAR: Peter Bankes (ENG)
Referee Observer: Jon Skjervold (NOR)
Lazio – Sturm Graz
Referee: Sascha Stegemann (GER)
Assistant Referee 1: Mark Borsch (GER)
Assistant Referee 2: Christof Günsch (GER)
Fourth Official: Robert Schröder (GER)
VAR: Marco Fritz (GER)
AVAR: Stuart Attwell (ENG)
Referee Observer: Stefan Johannesson (SWE)
Manchester United – Omonia
Referee: Jerôme Brisard (FRA)
Assistant Referee 1: Benjamin Pages (FRA)
Assistant Referee 2: Alexis Auger (FRA)
Fourth Official: Hakim Ben El Hadj (FRA)
VAR: Benoît Millot (FRA)
AVAR: Eric Wattellier (FRA)
Referee Observer: Carlos Clos Gomez (ESP)
Real Sociedad – Sheriff
Referee: Enea Jorgji (ALB)
Assistant Referee 1: Denis Rexha (ALB)
Assistant Referee 2: Ridiger Çokaj (ALB)
Fourth Official: Florian Lata (ALB)
VAR: Tiago Martins (POR)
AVAR: Paolo Valeri (ITA)
Referee Observer: Markus Strömbergsson (SWE)
PSV – Zürich
Referee: Ali Palabıyık (TUR)
Assistant Referee 1: Serkan Olguncan (TUR)
Assistant Referee 2: Ceyhun Sesigüzel (TUR)
Fourth Official: Hüseyin Göçek (TUR)
VAR: Massimiliano Irrati (ITA)
AVAR: Gianluca Aureliano (ITA)
Referee Observer: Martin Ingvarsson (SWE)
Ludogorets – HJK
Referee: Kristo Tohver (EST)
Assistant Referee 1: Silver Koiv (EST)
Assistant Referee 2: Sten Klaasen (EST)
Fourth Official: Martti Pukk (EST)
VAR: Luca Pairetto (ITA)
AVAR: Daniele Doveri (ITA)
Referee Observer: Cyril Zimmermann (SUI)
Union Berlin – Malmö FF
Referee: Aleksandar Stavrev (MKD)
Assistant Referee 1: Dejan Kostadinov (MKD)
Assistant Referee 2: Kushtrim Lika (MKD)
Fourth Official: Jovan Kachevski (MKD)
VAR: Fedayi San (SUI)
AVAR: Juan Martinez Munuera (ESP)
Referee Observer: Francesco Bianchi (SUI)
Trabzonspor – Monaco
Referee: Jakob Kehlet (DEN)
Assistant Referee 1: Lars Hummelgaard (DEN)
Assistant Referee 2: Victor Skytte (DEN)
Fourth Official: Sandri Putros (DEN)
VAR: David Coote (ENG)
AVAR: Jarred Gillett (ENG)
Referee Observer: Edward Foley (IRL)
Ferencvaros – Crvena Zvezda
Referee: Daniel Stefanski (POL)
Assistant Referee 1: Dawid Golis (POL)
Assistant Referee 2: Michal Obukowicz (POL)
Fourth Official: Damian Sylwestrzak (POL)
VAR: Tomasz Kwiatkowski (POL)
AVAR: Ricardo De Burgos Bengoetxea (ESP)
Referee Observer: Volodymyr Petrov (UKR)