AZ Alkmaar – Shakhtar Donetsk
Referee: Sven Jablonski GER (photo)
Assistant Referee 1: Eduard Beitinger GER
Assistant Referee 2: Lasse Koslowski GER
Fourth Official: Harm Osmers GER
VAR: Benjamin Brand GER
AVAR: Robert Schröder GER
Referee Observer: Martin Hansson SWE
AC Fiorentina – Crystal Palace
Referee: Jesús Gil Manzano ESP
Assistant Referee 1: Ángel Nevado Rodriguez ESP
Assistant Referee 2: Guadalupe Porras Ayuso ESP
Fourth Official: Juan Martínez Munuera ESP
VAR: Guillermo Cuadra Fernández ESP
AVAR: Valentín Pizarro Gómez ESP
Referee Observer: David Malcom NIR
AEK Athens – Rayo Vallecano
Referee: Espen Eskas NOR
Assistant Referee 1: Jan Engan NOR
Assistant Referee 2: Isaak Bashevkin NOR
Fourth Official: Sigurd Kringstad NOR
VAR: Michael Fabbri ITA
AVAR: Gianluca Aureliano ITA
Referee Observer: João Ferreira POR
RC Strasbourg – FSV Mainz
Referee: João Pinheiro POR
Assistant Referee 1: Bruno Jesus POR
Assistant Referee 2: Luciano Maia POR
Fourth Official: João Gonçalves POR
VAR: Tiago Martins POR
AVAR: André Narciso POR
Referee Observer: Uno Tutk EST
