Feyenoord – Panathinakos
Referee: Harm Osmers GER (photo)
Assistant Referee 1: Dominik Schaal GER
Assistant Referee 2: Christian Gittelmann GER
Fourth Official: Florian Exner GER
VAR: Christian Dingert GER
AVAR: Bastian Dankert GER
Referee Observer: Gediminas Mažeika LTU
Red Bull Salzburg – Ferencvarosi TC
Referee: Goga Kikacheishvili GEO
Assistant Referee 1: Davit Akhvlediani GEO
Assistant Referee 2: Davit Gabisonia GEO
Fourth Official: Bakari Bregadze GEO
VAR: Marco Di Bello ITA
AVAR: Bakur Ninua GEO
Referee Observer: Elmir Pilav BIH
Fenerbahce – VfB Stuttgart
Referee: Jakob Kehlet DEN
Assistant Referee 1: Lars Hummelgaard DEN
Assistant Referee 2: Dennis Rasmussen DEN
Fourth Official: Mikkel Redder DEN
VAR: Jonas Hansen DEN
AVAR: Jens Maae DEN
Referee Observer: Neale Barry ENG
SC Braga – Crvena Zvezda
Referee: Espen Eskas NOR
Assistant Referee 1: Jan Engan NOR
Assistant Referee 2: Isaak Bashevkin NOR
Fourth Official: Mohammad Aslam NOR
VAR: Jarred Gillett ENG
AVAR: Kristoffer Hagenes NOR
Referee Observer: Markus Nobs SUI
Olympique Lyonnais – FC Basel
Referee: Manfredas Lukjančukas LTU
Assistant Referee 1: Mangirdas Mirauskas LTU
Assistant Referee 2: Aleksandras Stepanovas LTU
Fourth Official: Mindaugas Jackus LTU
VAR: Rob Dieperink NED
AVAR: Sören Storks GER
Referee Observer: Hugh Dallas SCO
FCSB – Bologna FC
Referee: Andris Treimanis LVA
Assistant Referee 1: Haralds Gudermanis LVA
Assistant Referee 2: Aleksejs Spasjonnikovs LVA
Fourth Official: Aleksandrs Golubevs LVA
VAR: Jeroen Manschot NED
AVAR: Kristaps Ratnieks LVA
Referee Observer: Kenneth Clark SCO
Go Ahead Eagles – Aston Villa
Referee: Filip Glova SVK
Assistant Referee 1: Daniel Poláček SVK
Assistant Referee 2: Peter Bednár SVK
Fourth Official: Lukáš Dzivjak SVK
VAR: Tomasz Kwiatkowski POL
AVAR: Aleandro Di Paolo ITA
Referee Observer: Stéphane Lannoy FRA
KRC Genk – Real Betis
Referee: Elçin Masiyev AZE
Assistant Referee 1: Elşad Abdullayev AZE
Assistant Referee 2: Parvin Talibov AZE
Fourth Official: Tural Qurbanov AZE
VAR: Robert Schröder GER
AVAR: Nicat Ismayilli AZE
Referee Observer: Marinus Koopman NED
SK Brann – Rangers FC
Referee: Vasílios Fotiás GRE
Assistant Referee 1: Andréas Meindanás GRE
Assistant Referee 2: Michaíl Papadákis GRE
Fourth Official: Aléxandros Tsakalídis GRE
VAR: Ángelos Evangélou GRE
AVAR: Ioánnis Papadópoulos GRE
Referee Observer: João Ferreira POR
AS Roma – Viktoria Plzen
Referee: Halil Meler TUR
Assistant Referee 1: Abdullah Özkara TUR
Assistant Referee 2: Bersan Duran TUR
Fourth Official: Kadir Saglam TUR
VAR: Fedayi San SUI
AVAR: Jérôme Brisard FRA
Referee Observer: Vlado Svilokos CRO
LOSC Lille – PAOK Salonic
Referee: Nikola Dabanović MNE
Assistant Referee 1: Vladan Todorović MNE
Assistant Referee 2: Srdjan Jovanović MNE
Fourth Official: Miloš Bošković MNE
VAR: Michael Fabbri ITA
AVAR: Federico La Penna ITA
Referee Observer: Luis Medina Cantalejo ESP
Celtic FC – Sturm Graz
Referee: Juan Martínez Munuera ESP
Assistant Referee 1: Diego Barbero Sevilla ESP
Assistant Referee 2: Raúl Cabañero Martínez ESP
Fourth Official: Javier Alberola Rojas ESP
VAR: Carlos Del Cerro Grande ESP
AVAR: César Soto Grado ESP
Referee Observer: Pascal Garibian FRA
Maccabi Tel Aviv – FC Midtjylland
Referee: Georgi Kabakov BUL
Assistant Referee 1: Martin Margaritov BUL
Assistant Referee 2: Martin Venev BUL
Fourth Official: Volen Chinkov BUL
VAR: Dragomir Draganov BUL
AVAR: Nikola Popov BUL
Referee Observer: Karen Nalbandyan ARM
BSC Young Boys – PFK Ludogorets
Referee: Mohammad Al-Emara FIN
Assistant Referee 1: Turkka Valjakka FIN
Assistant Referee 2: Mika Lamppu FIN
Fourth Official: Peiman Simani FIN
VAR: Benjamin Brand GER
AVAR: Johann Pfeifer GER
Referee Observer: Howard Webb ENG
SC Freiburg – FC Utrecht
Referee: Rohit Saggi NOR
Assistant Referee 1: Jorgen Valstadsve NOR
Assistant Referee 2: Ole Haukasen NOR
Fourth Official: Daniel Higraff NOR
VAR: Bram Van Driessche BEL
AVAR: Matej Jug SVN
Referee Observer: Stefano Podeschi SMR
Nottingham Forrest – FC Porto
Referee: Radu Petrescu ROU
Assistant Referee 1: Radu Ghinguleac ROU
Assistant Referee 2: George Neacșu ROU
Fourth Official: Andrei Chivulete ROU
VAR: Cătălin Popa ROU
AVAR: Pol van Boekel NED
Referee Observer: Lassin Isaksen FRO
Celta de Vigo – OGC Nice
Referee: Sander van der Eijk NED
Assistant Referee 1: Rens Bluemink NED
Assistant Referee 2: Stefan de Groot NED
Fourth Official: Marc Nagtegaal NED
VAR: Dennis Higler NED
AVAR: Richard Martens NED
Referee Observer: Stefan Messner AUT
Malmo FF – GNK Dinamo
Referee: Willy Delajod FRA
Assistant Referee 1: Erwan Finjean FRA
Assistant Referee 2: Valentin Évrard FRA
Fourth Official: Thomas Léonard FRA
VAR: Bastien Dechepy FRA
AVAR: Nicolas Rainville FRA
Referee Observer: Shmuel Shteif ISR