Lazio – Alkmaar
Referee: Glenn Nyberg (SWE, photo)
Assistant Referee 1: Mahbod Beigi (SWE)
Assistant Referee 2: Andreas Söderqvist (SWE)
Fourth Official: Adam Ladebäck (SWE)
VAR: Christopher Kavanagh (ENG)
AVAR: David Coote (ENG)
Referee Observer: Fritz Stuchlik (AUT)
AEK Larnaca – West Ham
Referee: Espen Eskas (NOR)
Assistant Referee 1: Jan Engan (NOR)
Assistant Referee 2: Isaak Bashevkin (NOR)
Fourth Official: Kristoffer Hagenes (NOR)
VAR: Rob Dieperink (NED)
AVAR: Jeroen Manschot (NED)
Referee Observer: Stephane Lannoy (FRA)
FC Sheriff – OGC Nice
Referee: Aliyar Agayev (AZE)
Assistant Referee 1: Zeynal Zeynalov (AZE)
Assistant Referee 2: Akif Amirali (AZE)
Fourth Official: Elchin Masiyev (AZE)
VAR: Marco Guida (ITA)
AVAR: Michael Fabbri (ITA)
Referee Observer: Vlado Svilokos (CRO)
RSC Anderlecht – Villarreal CF
Referee: Bartosz Frankowski (POL)
Assistant Referee 1: Marcin Boniek (POL)
Assistant Referee 2: Jakub Winkler (POL)
Fourth Official: Damian Kos (POL)
VAR: Piotr Lasyk (POL)
AVAR: Krzysztof Myrmus (POL)
Referee Observer: Edward Foley (IRL)
ACF Fiorentina – Sivasspor
Referee: Enea Jorgji (ALB)
Assistant Referee 1: Denis Rexha (ALB)
Assistant Referee 2: Ridiger Çokaj (ALB)
Fourth Official: Juxhin Xhaja (ALB)
VAR: Luis Godinho (POR)
AVAR: Helder Malheiro (POR)
Referee Observer: Zbigniew Przesmycki (POL)
Lech Poznan – Djurgardens IF
Referee: Stéphanie Frappart (FRA)
Assistant Referee 1: Mikael Berchebru (FRA)
Assistant Referee 2: Steven Torregrossa (FRA)
Fourth Official: Bastien Dechepy (FRA)
VAR: Tiago Martins (POR)
AVAR: Benoît Millot (FRA)
Referee Observer: Miroslav Liba (CZE)
FC Basel – Slovan Bratislava
Referee: Rade Obrenovič (SVN)
Assistant Referee 1: Jure Praprotnik (SVN)
Assistant Referee 2: Grega Kordež (SVN)
Fourth Official: David Smajc (SVN)
VAR: Matej Jug (SVN)
AVAR: Nejc Kajtazovic (SVN)
Referee Observer: Lucilio Batista (POR)
KAA Gent – Istanbul Başakşehir
Referee: Kristo Tohver (EST)
Assistant Referee 1: Silver Koiv (EST)
Assistant Referee 2: Sten Klaasen (EST)
Fourth Official: Joonas Jaanovits (EST)
VAR: Sascha Stegemann (GER)
AVAR: Mike Pickel (GER)
Referee Observer: Martin Hansson (SWE)
