24 October 2019
Celtic – Lazio
Referee: Ivan Bebek (CRO, photo)
Assistant Referee 1: Goran Pataki (CRO)
Assistant Referee 2: Bojan Zobenica (CRO)
Fourth Official: Igor Pajač (CRO)
Referee Observer: Rien Koopman (NED)
Qarabağ FK – Apoel FC
Referee: Filip Glova (SVK)
Assistant Referee 1: František Ferenc (SVK)
Assistant Referee 2: Ján Pozor (SVK)
Fourth Official: Peter Ziemba (SVK)
Referee Observer: Michális Koukoulákis (GRE)
BSC Young Boys – Feyenoord
Referee: Jakob Kehlet (DEN)
Assistant Referee 1: Lars Hummelgaard (DEN)
Assistant Referee 2: Heine Sørensen (DEN)
Fourth Official: Jens Maae (DEN)
Referee Observer: Elmir Pilav (BIH)
FC Porto – Rangers FC
Referee: Nikola Dabanović (MNE)
Assistant Referee 1: Milutin Djukić (MNE)
Assistant Referee 2: Vladan Todorović (MNE)
Fourth Official: Miloš Bošković (MNE)
Referee Observer: Gylfi Orrason (ISL)
CSKA Moskva – Ferencvárosi TC
Referee: Pavel Orel (CZE)
Assistant Referee 1: Petr Blažej (CZE)
Assistant Referee 2: Jiří Kříž (CZE)
Fourth Official: Ondřej Pechanec (CZE)
Referee Observer: Gevorg Hovhannisyan (ARM)
PFC Ludogorets – Espanyol de Barcelona
Referee: Aliyar Ağayev (AZE)
Assistant Referee 1: Zeynal Zeynalov (AZE)
Assistant Referee 2: Akif Amirali (AZE)
Fourth Official: Orxan Mammadov (AZE)
Referee Observer: Pascal Garibian (FRA)
AS Saint Étienne – FC Oleksandriya
Referee: Espen Eskas (NOR)
Assistant Referee 1: Jon Knutsen (NOR)
Assistant Referee 2: Oystein Ytterland (NOR)
Fourth Official: Rohit Saggi (NOR)
Referee Observer: Robert Sedlacek (AUT)
KAA Gent – VfL Wolfsburg
Referee: Sergei Ivanov (RUS)
Assistant Referee 1: Roman Usachov (RUS)
Assistant Referee 2: Aleksei Lunev (RUS)
Fourth Official: Mikhail Vilkov (RUS)
Referee Observer: Jouni Hyytiä (FIN)
Medipol Başakşehir – Pellets Wolfsberger
Referee: Irfan Peljto (BIH)
Assistant Referee 1: Senad Ibrišimbegović (BIH)
Assistant Referee 2: Davor Beljo (BIH)
Fourth Official: Haris Kaljanac (BIH)
Referee Observer: Cyril Zimmermann (SUI)
AS Roma – Borussia Mönchengladbach
Referee: William Collum (SCO)
Assistant Referee 1: Francis Connor (SCO)
Assistant Referee 2: David McGeachie (SCO)
Fourth Official: Donald Robertson (SCO)
Referee Observer: Ferenc Székely (HUN)
Beşiktaş JK – SC Braga
Referee: Alejandro Hernández Hernández (ESP)
Assistant Referee 1: Teodoro Sobrino Magán (ESP)
Assistant Referee 2: Raúl Cabañero Martínez (ESP)
Fourth Official: José Munuera Montero (ESP)
Referee Observer: Yuri Baskakov (RUS)
Slovan Bratislava – Wolverhampton Wanderers
Referee: Yevhen Aranovsky (UKR)
Assistant Referee 1: Semen Shlonchak (UKR)
Assistant Referee 2: Andri Skrypka (UKR)
Fourth Official: Vitali Romanov (UKR)
Referee Observer: Zoran Petrović (SRB)
AZ Alkmaar – FC Astana
Referee: Enea Jorgji (ALB)
Assistant Referee 1: Ridiger Çokaj (ALB)
Assistant Referee 2: Rejdi Avdo (ALB)
Fourth Official: Kridens Meta (ALB)
Referee Observer: Michael Ross (NIR)
FK Partizan – Manchester United
Referee: Xavier Estrada Fernández (ESP)
Assistant Referee 1: Roberto Alonso Fernández (ESP)
Assistant Referee 2: Íñigo Prieto López (ESP)
Fourth Official: Pablo González Fuertes (ESP)
Referee Observer: Marián Ružbarský (SVK)
Sevilla FC – F91 Dudelange
Referee: Anastásios Papapétrou (GRE)
Assistant Referee 1: Trýfon Petrópoulos (GRE)
Assistant Referee 2: Iordánis Aptósoglou (GRE)
Fourth Official: Ángelos Evangélou (GRE)
Referee Observer: Thomas Einwaller (AUT)
Malmö FF – FC Lugano
Referee: Robert Harvey (IRL)
Assistant Referee 1: Wayne McDonnell (IRL)
Assistant Referee 2: Mark Gavin (IRL)
Fourth Official: Neil Doyle (IRL)
Referee Observer: Albano Janku (ALB)
Dynamo Kyiv – FC København
Referee: Halil Umut Meler (TUR)
Assistant Referee 1: Cevdet Kömürcüoğlu (TUR)
Assistant Referee 2: Ekrem Kan (TUR)
Fourth Official: Arda Kardeşler (TUR)
Referee Observer: Kristinn Jakobsson (ISL)
Trabzonspor – FC Krasnodar
Referee: Harald Lechner (AUT)
Assistant Referee 1: Andreas Heidenreich (AUT)
Assistant Referee 2: Maximilian Kolbitsch (AUT)
Fourth Official: Julian Weinberger (AUT)
Referee Observer: Peter Sippel (GER)
Getafe CF – FC Basel
Referee: Jérôme Brisard (FRA)
Assistant Referee 1: Benjamin Pagès (FRA)
Assistant Referee 2: Mehdi Rahmouni (FRA)
Fourth Official: Amaury Delerue (FRA)
Referee Observer: Ichko Lozev (BUL)
Sporting CP – Rosenborg BK
Referee: Lawrence Visser (BEL)
Assistant Referee 1: Thibaud Nijssen (BEL)
Assistant Referee 2: Jo De Weirdt (BEL)
Fourth Official: Bram Van Driessche (BEL)
Referee Observer: Sabri Çelik (TUR)
PSV Eindhoven – Linzer ASK
Referee: Christopher Kavanagh (ENG)
Assistant Referee 1: Daniel Cook (ENG)
Assistant Referee 2: Sian Massey-Ellis (ENG)
Fourth Official: Peter Bankes (ENG)
Referee Observer: Stéphane Lannoy (FRA)
Stade Rennais – CFR Cluj
Referee: Aleksei Eskov (RUS)
Assistant Referee 1: Dmitri Mosyakin (RUS)
Assistant Referee 2: Valeri Danchenko (RUS)
Fourth Official: Vladislav Bezborodov (RUS)
Referee Observer: Kevin Azzopardi (MLT)
Arsenal FC – Vitória SC
Referee: Serdar Gözübüyük (NED)
Assistant Referee 1: Charles Schaap (NED)
Assistant Referee 2: Jan de Vries (NED)
Fourth Official: Jeroen Manschot (NED)
Referee Observer: Luis Medina Cantalejo (ESP)
Eintracht Frankfurt – Standard de Liège
Referee: Daniel Stefański (POL)
Assistant Referee 1: Marcin Boniek (POL)
Assistant Referee 2: Dawid Golis (POL)
Fourth Official: Damian Sylwestrzak (POL)
Referee Observer: Jon Skjervold (NOR)