Viktoria Plzen – Servette FC
Referee: William Collum SCO (photo)
Assistant Referee 1: Francis Connor SCO
Assistant Referee 2: David McGeachie SCO
Fourth Official: Nicolas Walsh SCO
VAR: David Coote ENG
AVAR: Andrew Dallas SCO
Referee Observer: Uno Tutk EST
Fenerbahçe – Union St. Gilloise
Referee: Nikola Dabanović MNE
Assistant Referee 1: Vladan Todorović MNE
Assistant Referee 2: Srdjan Jovanović MNE
Fourth Official: Miloš Bošković MNE
VAR: Carlos Del Cerro Grande ESP
AVAR: Fran Jović CRO
Referee Observer: Jon Skjervold NOR
PAOK – GNK Dinamo
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: Benjamin Brand GER
Referee Observer: Jan Wegereef NED
ACF Fiorentina – Maccabi Haifa
Referee: Irfan Peljto BIH
Assistant Referee 1: Senad Ibrišimbegović BIH
Assistant Referee 2: Davor Beljo BIH
Fourth Official: Miloš Gigović BIH
VAR: Juan Martínez Munuera ESP
AVAR: Ivan Bebek CRO
Referee Observer: Joao Ferreira POR
Aston Villa – AFC Ajax
Referee: Orel Grinfeld ISR
Assistant Referee 1: Roi Hassan ISR
Assistant Referee 2: Idan Yarkoni ISR
Fourth Official: Gal Leibovitz ISR
VAR: Ziv Adler ISR
AVAR: Roi Reinshreiber ISR
Referee Observer: Bernardino Gonzalez Vazquez ESP
Club Brugge – Molde FK
Referee: Radu Petrescu ROU
Assistant Referee 1: Radu Ghinguleac ROU
Assistant Referee 2: Mircea Grigoriu ROU
Fourth Official: Marcel Bîrsan ROU
VAR: Ovidiu Hațegan ROU
AVAR: Sebastian Colțescu ROU
Referee Observer: Manuel Diaz Vega ESP
LOSC Lille – Sturm Graz
Referee: Matej Jug SVN
Assistant Referee 1: Matej Žunič SVN
Assistant Referee 2: Manuel Vidali SVN
Fourth Official: David Šmajc SVN
VAR: Nejc Kajtazovič SVN
AVAR: Asmir Sagrkovič SVN
Referee Observer: Rien Koopman NED
Maccabi Tel Aviv – Olympiakos SFP
Referee: Maurizio Mariani ITA
Assistant Referee 1: Daniele Bindoni ITA
Assistant Referee 2: Alberto Tegoni ITA
Fourth Official: Andrea Colombo ITA
VAR: Marco Di Bello ITA
AVAR: Gianluca Aureliano ITA
Referee Observer: Peter Sippel GER
