1 October 2020
Ararat Armenia – Crvena Zvezda
Referee: Anastasios Sidiropoulos (GRE, photo)
Assistant Referee 1: Polychronis Kostaras (GRE)
Assistant Referee 2: Lazaros Dimitriadis (GRE)
Fourth Official: Ioannis Papadopoulos (GRE)
Referee Observer: Ichko Lozev (BUL)
CFR Cluj – KuPS Kuopio
Referee: Ivan Bebek (CRO)
Assistant Referee 1: Goran Pataki (CRO)
Assistant Referee 2: Bojan Zobenica (CRO)
Fourth Official: Mario Zebec (CRO)
Referee Observer: Miroslav Tulinger (CZE)
GNK Dinamo – Flora Tallinn
Referee: Ali Palabiyik (TUR)
Assistant Referee 1: Serkan Olguncan (TUR)
Assistant Referee 2: Cem Satman (TUR)
Fourth Official: Arda Kardeşler (TUR)
Referee Observer: Martin Ingvarsson (SWE)
Slovan Liberec – Apoel FC
Referee: Andreas Ekberg (SWE)
Assistant Referee 1: Mehmet Culum /(SWE)
Assistant Referee 2: Stefan Hallberg (SWE)
Fourth Official: Kristoffer Karlsson (SWE)
Referee Observer: Haim Jakov (ISR)
Malmö FF – Granada CF
Referee: Istvan Kovacs (ROU)
Assistant Referee 1: Vasile Marinescu (ROU)
Assistant Referee 2: Mihai Artene (ROU)
Fourth Official: Marius Avram (ROU)
Referee Observer: Tomasz Mikulski (POL)
Charleroi SC – Lech Poznan
Referee: Felix Zwayer (GER)
Assistant Referee 1: Thorsten Schiffner (GER)
Assistant Referee 2: Marco Achmüller (GER)
Fourth Official: Bejmain Cortus (GER)
Referee Observer: Jouni Hyytiä (FIN)
Rosenborg BK – PSV Eindhoven
Referee: Davide Massa (ITA)
Assistant Referee 1: Alberto Tegoni (ITA)
Assistant Referee 2: Stefano Alassio (ITA)
Fourth Official: Fabio Maresca (ITA)
Referee Observer: Uno Tutk (EST)
Hapoel Beer Sheva – Viktoria Plzen
Referee: Srdjan Jovanović (SRB)
Assistant Referee 1: Uroš Stojković (SRB)
Assistant Referee 2: Milan Mihajlović (SRB)
Fourth Official: Novak Simović (SRB)
Referee Observer: Alexandru Deaconu (ROU)
Legia Warszawa – Qarabag FK
Referee: Tobias Stieler (GER)
Assistant Referee 1: Christian Gittelmann (GER)
Assistant Referee 2: Rafael Foltyn (GER)
Fourth Official: Daniel Schlager (GER)
Referee Observer: Emil Bozhinovski (MKD)
FK Sarajevo – Celtic FC
Referee: Benoît Bastien (FRA)
Assistant Referee 1: Hicham Zakrani (FRA)
Assistant Referee 2: Frederic Haquette (FRA)
Fourth Official: Benoît Millot (FRA)
Referee Observer: Volodymyr Petrov (UKR)
Dynamo Brest – PFC Ludogorets
Referee: Slavko Vinčić (SVN)
Assistant Referee 1: Andraž Kovacić (SVN)
Assistant Referee 2: Grega Kordež (SVN)
Fourth Official: Nejć Kajtazović (SVN)
Referee Observer: Costas Kapitanis (CYP)
Standard de Liege - Fehervar FC
Referee: William Collum (SCO)
Assistant Referee 1: David McGeachie (SCO)
Assistant Referee 2: Francis Connor (SCO)
Fourth Official: Kevin Clancy (SCO)
Referee Observer: Stefan Messner (AUT)
FC Copenhagen – HNK Rijeka
Referee: Christopher Kavanagh (ENG)
Assistant Referee 1: Daniel Cook (ENG)
Assistant Referee 2: Sian Massey-Ellis (ENG)
Fourth Official: Peter Bankes (ENG)
Referee Observer: Peter Sippel (GER)
Dundalk FC – KI Klaksvik
Referee: Maurizio Mariani (ITA)
Assistant Referee 1: Matteo Passeri (ITA)
Assistant Referee 2: Daniele Bindoni (ITA)
Fourth Official: Michael Fabbri (ITA)
Referee Observer: Stavros Tritsonis (GRE)
BSC Young Boys – KF Tirana
Referee: Sergei Karasev (RUS)
Assistant Referee 1: Igor Demeshko (RUS)
Assistant Referee 2: Maksim Gavrilin (RUS)
Fourth Official: Mikhail Vilkov (RUS)
Referee Observer: Bernardino Gonzalez Vazquez (ESP)
FC Basel – CSKA Sofia
Referee: Ivan Kruzliak (SVK)
Assistant Referee 1: Tomas Somolani (SVK)
Assistant Referee 2: Branislav Hancko (SVK)
Fourth Official: Peter Kralovic (SVK)
Referee Observer: Darko Čeferin (SVN)
Rangers FC – Galatasaray AS
Referee: Andris Treimanis (LVA)
Assistant Referee 1: Haralds Gudermanis (LVA)
Assistant Referee 2: Aleksejs Spasjonnikovs (LVA)
Fourth Official: Aleksandrs Golubevs (LVA)
Referee Observer: Alfredo Trentalange (ITA)
AEK Athens – VfL Wolfsburg
Referee: Artur Soares Dias (POR)
Assistant Referee 1: Rui Tavares (POR)
Assistant Referee 2: Paulo Santos (POR)
Fourth Official: Joao Pinheiro (POR)
Referee Observer: Laurent Duhamel (FRA)
Tottenham Hotspur – Maccabi Haifa
Referee: Ruddy Buquet (FRA)
Assistant Referee 1: Guillaume Debart (FRA)
Assistant Referee 2: Cyril Gringore (FRA)
Fourth Official: Amaury Delerue (FRA)
Referee Observer: Rune Pedersen (NOR)
Sporting Clube de Portugal – LASK
Referee: Alexey Kulbakov (BLR)
Assistant Referee 1: Dzimitry Zhuk (BLR)
Assistant Referee 2: Aleh Maslianka (BLR)
Fourth Official: Viktar Shymusik (BLR)
Referee Observer: Vlado Svilokos (CRO)
Rio Ave FC – AC Milan
Referee: Jesus Gil Manzano (ESP)
Assistant Referee 1: Diego Barbero Sevilla (ESP)
Assistant Referee 2: Angel Nevado Rodriguez (ESP)
Fourth Official: Javier Alberola Rojas (ESP)
Referee Observer: Nikolai Levnikov (RUS)