Fenerbahce – Dynamo Kyiv
Referee: Tamas Bognar (HUN, photo)
Assistant Referee 1: Balazs Buzas (HUN)
Assistant Referee 2: Peter Kobor (HUN)
Fourth Official: Adam Farkas (HUN)
VAR: Pascal Müller (GER)
AVAR: Markus Sinn (GER)
Referee Observer: Boško Jovanetić (SRB)
Zürich – Arsenal
Referee: Mohammed Al-Hakim (SWE)
Assistant Referee 1: Fredrik Klyver (SWE)
Assistant Referee 2: Max Wilde (SWE)
Fourth Official: Bojan Pandžić (SWE)
VAR: Rob Dieperink (NED)
AVAR: Edwin Van De Graaf (NED)
Referee Observer: Darko Čeferin (SVN)
PSV – Bodo Glimt
Referee: Georgi Kabakov (BUL)
Assistant Referee 1: Martin Margaritov (BUL)
Assistant Referee 2: Diyan Valkov (BUL)
Fourth Official: Radoslav Gidzhenov (BUL)
VAR: Marco Fritz (GER)
AVAR: Bastian Dankert (GER)
Referee Observer: Michael Riley (ENG)
AEK Larnaca – Rennes
Referee: Giorgi Kruashvili (GEO)
Assistant Referee 1: Levan Varamishvili (GEO)
Assistant Referee 2: Zaza Pipia (GEO)
Fourth Official: Davit Kharitonashvili (GEO)
VAR: Benjamin Brand (GER)
AVAR: Marco Achmüller (GER)
Referee Observer: Leslie Irvine (NIR)
Ludogorets – AS Roma
Referee: Craig Pawson (ENG)
Assistant Referee 1: Lee Betts (ENG)
Assistant Referee 2: Ian Hussin (ENG)
Fourth Official: Robert Jones (ENG)
VAR: Darren England (ENG)
AVAR: Peter Bankes (ENG)
Referee Observer: Vlado Svilokos (CRO)
HJK Helsinki – Real Betis
Referee: Roi Reinshreiber (ISR)
Assistant Referee 1: David Elias Biton (ISR)
Assistant Referee 2: Sagy Metzamberv (ISR)
Fourth Official: Eitan Shmuelevitz (ISR)
VAR: David Fuxman (ISR)
AVAR: Ziv Adler (ISR)
Referee Observer: Stephen Lodge (ENG)
Malmö – Braga
Referee: Duje Strukan (CRO)
Assistant Referee 1: Bojan Zobenica (CRO)
Assistant Referee 2: Alen Jakšić (CRO)
Fourth Official: Ivan Bebek (CRO)
VAR: Bartosz Frankowski (POL)
AVAR: Tomasz Kwiatkowski (POL)
Referee Observer: Drago Kos (SVN)
Union Berlin – St. Gilloise
Referee: Serhiy Boiko (UKR)
Assistant Referee 1: Semen Shlonchak (UKR)
Assistant Referee 2: Oleksandr Zhukov (UKR)
Fourth Official: Vitaliy Romanov (UKR)
VAR: Pol van Boekel (NED)
AVAR: Dennis Higler (NED)
Referee Observer: Erol Ersoy (TUR)
Manchester United – Real Sociedad
Referee: Marco Di Bello (ITA)
Assistant Referee 1: Fabiano Preti (ITA)
Assistant Referee 2: Giorgio Peretti (ITA)
Fourth Official: Giovanni Ayroldi (ITA)
VAR: Massimiliano Irrati (ITA)
AVAR: Marco Guida (ITA)
Referee Observer: Alon Yefet (ISR)
Omonia – Sheriff
Referee: Rade Obrenović (SVN)
Assistant Referee 1: Jure Praprotnik (SVN)
Assistant Referee 2: Grega Kordež (SVN)
Fourth Official: Alen Borošak (SVN)
VAR: Nejc Kajtazović (SVN)
AVAR: Asmir Sagrković (SVN)
Referee Observer: Marinus Koopman (NED)
Lazio – Feyenoord
Referee: Ricardo De Burgos Bengoetchea (ESP)
Assistant Referee 1: Roberto Diaz Perez (ESP)
Assistant Referee 2: Iker De Francisco Grijalba (ESP)
Fourth Official: Jose Munuera Montero (ESP)
VAR: Guillermo Cuadra Fernandez (ESP)
AVAR: Tiago Martins (POR)
Referee Observer: Vladimir Antonov (MDA)
Sturm Graz – Midtjylland
Referee: Aliyar Aghayev (AZE)
Assistant Referee 1: Zeynal Zeynalov (AZE)
Assistant Referee 2: Akif Amirali (AZE)
Fourth Official: Ingilab Mammadov (AZE)
VAR: Abdulkadir Bitigen (TUR)
AVAR: Mete Kalkavan (TUR)
Referee Observer: Iain Robertson Brines (SCO)
Nantes – Olympiacos
Referee: Harald Lechner (AUT)
Assistant Referee 1: Andreas Heidenreich (AUT)
Assistant Referee 2: Maximilian Kolbitsch (AUT)
Fourth Official: Markus Hameter (AUT)
VAR: Christian Ciochirca (AUT)
AVAR: Alan Kijas (AUT)
Referee Observer: Stefano Podeschi (SMR)
Freiburg – Qarabag
Referee: Erik Lambrechts (BEL)
Assistant Referee 1: Jo de Weirdt (BEL)
Assistant Referee 2: Mathias Hillaert (BEL)
Fourth Official: Wim Smet (BEL)
VAR: Willy Delajod (FRA)
AVAR: Benoît Millot (FRA)
Referee Observer: David Fernandez Borbalan (ESP)
Crvena Zvezda – AS Monaco
Referee: Harm Osmers (GER)
Assistant Referee 1: Robert Kempter (GER)
Assistant Referee 2: Dominik Schaal (GER)
Fourth Official: Robert Schröder (GER)
VAR: Sören Storks (GER)
AVAR: Rafael Foltyn (GER)
Referee Observer: William Young (SCO)
Ferencvaros – Trabzonspor
Referee: Fabio Maresca (ITA)
Assistant Referee 1: Giovanni Baccini (ITA)
Assistant Referee 2: Davide Imperiale (ITA)
Fourth Official: Federico Dionisi (ITA)
VAR: Michael Fabbri (ITA)
AVAR: Daniele Doveri (ITA)
Referee Observer: Robert Sedlacek (AUT)