Omonia Nicosia – Rakow Czestochowa
Referee: Sandro Schärer SUI (photo)
Assistant Referee 1: Jonas Erni SUI
Assistant Referee 2: Nicolas Tuberosa SUI
Fourth Official: Johannes von Mandach SUI
VAR: Lukas Fähndrich SUI
AVAR: Mirel Turkes SUI
Referee Observer: Jan Wegereef NED
Shakhtar Donetsk – HNK Rijeka
Referee: Anthony Taylor ENG
Assistant Referee 1: Adam Nunn ENG
Assistant Referee 2: Lee Betts ENG
Fourth Official: Thomas Bramall ENG
VAR: Michael Salisbury ENG
AVAR: Matthew Donohue ENG
Referee Observer: Albano Janku ALB
AZ Alkmaar – Jagiellonia Bialystok
Referee: Stefan Ebner AUT
Assistant Referee 1: Robert Steinacher AUT
Assistant Referee 2: Martin Höfler AUT
Fourth Official: Alexander Harkam AUT
VAR: Christian Ciochirca AUT
AVAR: Julian Weinberger AUT
Referee Observer: Karen Nalbandyan ARM
Slovan Bratislava – BK Hacken
Referee: Florian Lata ALB
Assistant Referee 1: Ilir Tartaraj ALB
Assistant Referee 2: Erind Burgu ALB
Fourth Official: Enea Jorgji ALB
VAR: Kreshnik Bajramaj ALB
AVAR: Kreshnik Cjapi ALB
Referee Observer: Leslie Irvine NIR
Legia Warszawa – Lincoln Red Imps
Referee: Danilo Nikolić SRB
Assistant Referee 1: Miloš Simović SRB
Assistant Referee 2: Svetozar Živin SRB
Fourth Official: Nikola Radaković SRB
VAR: Aleksandar Živković SRB
AVAR: Pavle Tomić SRB
Referee Observer: Svein Oddvar Moen NOR
Sparta Praha – Aberdeen FC
Referee: David Šmajc SVN
Assistant Referee 1: David Gabrovec SVN
Assistant Referee 2: Tomaž Černe SVN
Fourth Official: Denis Šabanagić SVN
VAR: Asmir Sagrković SVN
AVAR: Mihael Antič SVN
Referee Observer: Babak Quliyev AZE
Dynamo Kyiv – Noa FA
Referee: Juxhin Xhaja ALB
Assistant Referee 1: Arbër Zalla ALB
Assistant Referee 2: Rejdi Avdo ALB
Fourth Official: Olsion Yzeiraj ALB
VAR: Jeroen Manschot NED
AVAR: Albert Doda ALB
Referee Observer: Jon Skjervold NOR
Crystal Palace – Kups Kuopio
Referee: Yigal Frid ISR
Assistant Referee 1: Rostislav Talis ISR
Assistant Referee 2: Tuval Koltunoff ISR
Fourth Official: David Fuxman ISR
VAR: Daniel Natan ISR
AVAR: Shalom Avraham ISR
Referee Observer: Stefan Johannesson SWE
Rayo Vallecano – FC Drita
Referee: Urs Schnyder SUI
Assistant Referee 1: Marco Zürcher SUI
Assistant Referee 2: Benjamin Zürcher SUI
Fourth Official: Sven Wolfensberger SUI
VAR: Luca Cibelli SUI
AVAR: Anojen Kanagasingam SUI
Referee Observer: Pawel Gil POL
Shamrock Rovers – Hamrun Spartans
Referee: Marek Radina CZE
Assistant Referee 1: Kamil Hájek CZE
Assistant Referee 2: Lukáš Machač CZE
Fourth Official: Jan Všetečka CZE
VAR: Miroslav Zelinka CZE
AVAR: Pavel Orel CZE
Referee Observer: Domagoj Vučkov CRO
FSV Mainz – Samsunspor
Referee: Mohammad Al-Emara FIN
Assistant Referee 1: Turkka Valjakka FIN
Assistant Referee 2: Mika Lamppu FIN
Fourth Official: Peiman Simani FIN
VAR: Clay Ruperti NED
AVAR: Edwin van de Graaf NED
Referee Observer: David Malcolm NIR
RC Strasbourg – Breidablik
Referee: Ondřej Berka CZE
Assistant Referee 1: Ivo Nádvorník CZE
Assistant Referee 2: Matěj Vlček CZE
Fourth Official: Ondřej Pechanec CZE
VAR: Tomáš Kocourek CZE
AVAR: Jana Adámková CZE
Referee Observer: Ichko Lozev BUL
NK Celje – Shelbourne FC
Referee: Sandi Putros DEN
Assistant Referee 1: Deniz Yurdakul DEN
Assistant Referee 2: Steffen Bramsen DEN
Fourth Official: Jacob Karlsen DEN
VAR: Jakob Kehlet DEN
AVAR: Lasse Graagaard DEN
Referee Observer: Michaíl Koukoulákis GRE
Zrinjski Mostar – Rapid Wien
Referee: Ishmael Barbara MLT
Assistant Referee 1: Luke Portelli MLT
Assistant Referee 2: Duncan Sultana MLT
Fourth Official: Philip Farrugia MLT
VAR: Michael Fabbri ITA
AVAR: Daniele Paterna ITA
Referee Observer: Helmut Fleischer GER
AEK Athens – Universitatea Craiova
Referee: Giorgi Kruashvili GEO
Assistant Referee 1: Levan Varamishvili GEO
Assistant Referee 2: Giorgi Elikashvili GEO
Fourth Official: Giorgi Avazashvili GEO
VAR: Sören Storks GER
AVAR: Aleko Aptsiauri GEO
Referee Observer: Elmir Pilav BIH
Sigma Olomouc – Lech Poznan
Referee: Patrik Kolarić CRO
Assistant Referee 1: Luka Pajić CRO
Assistant Referee 2: Ivan Starčević CRO
Fourth Official: Ante Terzić CRO
VAR: Fran Jović CRO
AVAR: Ante Čuljak CRO
Referee Observer: John Ward IRL
AEK Larnaca – KF Shkendija
Referee: Manfredas Lukjančukas LTU
Assistant Referee 1: Mangirdas Mirauskas LTU
Assistant Referee 2: Aleksandras Stepanovas LTU
Fourth Official: Vilius Paulauskas LTU
VAR: Donatas Šimėnas LTU
AVAR: Orestas Abramavičius LTU
Referee Observer: Marián Ružbarský SVK
Lausanne Sport – AC Fiorentina
Referee: Lothar D’Hondt BEL
Assistant Referee 1: Romain Devillers BEL
Assistant Referee 2: Nico Claes BEL
Fourth Official: Wesli De Cremer BEL
VAR: Jan Boterberg BEL
AVAR: Bert Put BEL
Referee Observer: Dejan Filipović SRB