Astana – Chelsea
Referee: Sven Jablonski GER (photo)
Assistant Referee 1: Lasse Koslowski GER
Assistant Referee 2: Marco Achmüller GER
Fourth Official: Tobias Reichel GER
VAR: Pascal Müller GER
AVAR: Katrin Rafalski GER
Referee Observer: Petteri Kari FIN
FC Copenhagen – Heart of Midlothian
Referee: Andrea Colombo ITA
Assistant Referee 1: Ciro Carbone ITA
Assistant Referee 2: Giorgio Peretti ITA
Fourth Official: Simone Sozza ITA
VAR: Luca Pairetto ITA
AVAR: Valerio Marini ITA
Referee Observer: Alberto Undiano Mallenco ESP
Vikingur Reykjavik – Djugardens IF
Referee: Luka Bilbija BIH
Assistant Referee 1: Damir Lazić BIH
Assistant Referee 2: Amer Macić BIH
Fourth Official: Dragan Petrović BIH
VAR: Mario Zebec CRO
AVAR: Nihad Ljajić BIHReferee Observer: Mark Whitby WAL
AC Fiorentina – LASK Linz
Referee: Balázs Berke HUN
Assistant Referee 1: Vencel Tóth HUN
Assistant Referee 2: Balázs Szert HUN
Fourth Official: Sándor Andó-Szabó HUN
VAR: István Vad HUN
AVAR: Eszter Urbán HUN
Referee Observer: Gediminas Mažeika LTU
Basaksehir – Heidenheim
Referee: Marco Guida ITA
Assistant Referee 1: Davide Imperiale ITA
Assistant Referee 2: Alessio Berti ITA
Fourth Official: Gianluca Manganiello ITAVAR: Paolo Mazzoleni ITA
AVAR: Daniele Paterna ITA
Referee Observer: Edward Foley IRL
Legia Warszawa – FC Lugano
Referee: Juan Martínez Munuera ESP
Assistant Referee 1: Iker de Francisco Grijalba ESP
Assistant Referee 2: Iván Massó Granado ESP
Fourth Official: Mario Melero López ESP
VAR: José Munuera Montero ESP
AVAR: Adrián Cordero Vega ESP
Referee Observer: Iain Robertson Brines SCO
HJK Helsinki – Molde FK
Referee: Atilla Karaoglan TUR
Assistant Referee 1: Ceyhun Sesigüzel TUR
Assistant Referee 2: Abdullah Özkara TUR
Fourth Official: Çağdaş Altay TUR
VAR: Erkan Engin TUR
AVAR: Onur Özütoprak TUR
Referee Observer: Pavel Salii KAZ
Olimpija Ljubljana – Cercle Brugge
Referee: Adam Ladebäck SWE
Assistant Referee 1: Niklas Nyberg SWE
Assistant Referee 2: Daniel Yng SWE
Fourth Official: Oscar Johnson SWE
VAR: Robert Schröder GER
AVAR: Patrick Hanslbauer GER
Referee Observer: Asim Xudiyev AZE
FC Petrocub – Real Betis
Referee: Lothar D’Hondt BEL
Assistant Referee 1: Romain Devillers BEL
Assistant Referee 2: Nico Claes BEL
Fourth Official: Simon Bourdeaud’hui BEL
VAR: Jan Boterberg BEL
AVAR: Bert Put BEL
Referee Observer: Michael Ross NIR
Dynamo Minsk – Larne FC
Referee: Saiat Qarabaev KAZ
Assistant Referee 1: Aleksei Dolgih KAZ
Assistant Referee 2: Dmitrii Belogradov KAZ
Fourth Official: Aidyn Tasybaev KAZ
VAR: Jeroen Manschot NED
AVAR: Daniiar Sahi KAZ
Referee Observer: Gunnar Jónsson ISLNoa FA – Apoel FC
Referee: Miloš Milanović SRB
Assistant Referee 1: Milan Pašajlić SRB
Assistant Referee 2: Novak Novaković SRB
Fourth Official: Milan Ilić SRB
VAR: Momčilo Marković SRB
AVAR: Novak Simović SRB
Referee Observer: Marco Borg MLT
KAA Gent – TSC Backa Topola
Referee: Ashot Ghaltakhchyan ARM
Assistant Referee 1: Mesrop Ghazaryan ARM
Assistant Referee 2: Atom Sevgulyan ARM
Fourth Official: Henrik Nalbandyan ARM
VAR: Zaven Hovhannisyan ARM
AVAR: Artem Gasparyan ARM
Referee Observer: Jon Skjervold NOR
Omonia Nicosia – Rapid Wien
Referee: Daniel Stefanski POL
Assistant Referee 1: Dawid Golis POL
Assistant Referee 2: Michal Obukowicz POL
Fourth Official: Damian Sylwestrzak POL
VAR: Piotr Lasyk POL
AVAR: Krzysztof Myrmus POL
Referee Observer: Augustus Constantin ROU
Shamrock Rovers – Borac Banja Luka
Referee: Stefan Ebner AUT
Assistant Referee 1: Robert Steinacher AUT
Assistant Referee 2: Martin Höfler AUT
Fourth Official: Julian Weinberger AUT
VAR: Manuel Schüttengruber AUT
AVAR: Sara Telek AUT
Referee Observer: Marián Ružbarský SVK
The New Saints – Panathinaikos
Referee: Oliver Reitala FIN
Assistant Referee 1: Jukka Honkanen FIN
Assistant Referee 2: OIli Jantunen FIN
Fourth Official: Antti Munukka FIN
VAR: Gianluca Aureliano ITA
AVAR: Rosario Abisso ITA
Referee Observer: Robert Sedlacek AUT
Mlada Boleslav – Jagiellonia Bialystok
Referee: David Dickinson SCO
Assistant Referee 1: Francis Connor SCO
Assistant Referee 2: Jonathan Bell SCO
Fourth Official: Ross Hardie SCO
VAR: Kevin Clancy SCO
AVAR: Greg Aitken SCO
Referee Observer: Vadims Direktorenko LVA
FC St. Gallen – Vitoria FC
Referee: Nicholas Walsh SCO
Assistant Referee 1: David McGeachie SCO
Assistant Referee 2: Calum Spence SCO
Fourth Official: Christopher Graham SCOVAR: Donald Robertson SCO
AVAR: Alan Muir SCO
Referee Observer: Bariş Şimşek TUR
Pafos FC – NK Celje
Referee: Pawel Raczkowski POL
Assistant Referee 1: Marcin Boniek POL
Assistant Referee 2: Radoslaw Siejka POL
Fourth Official: Marcin Szczerbowicz POLVAR: Pawel Pskit POL
AVAR: Wojciech Myć POL
Referee Observer: Gevorg Hovhannisyan ARM
