25-26 August 2020PAOK – Besiktas
Referee: Daniele Doveri (ITA, photo)
Assistant Referee 1: Matteo Passeri (ITA)
Assistant Referee 2: Dario Cecconi (ITA)
Fourth Official: Gianpaolo Calvarese (ITA)
Referee Observer: Fredy Fautrel (FRA)
Tirana – Crvena Zvezda
Referee: Kaspar Sjöberg (SWE)
Assistant Referee 1: Peter Magnusson (SWE)
Assistant Referee 2: Mikael Hallin (SWE)
Fourth Official: Mohammed Al-Hakim (SWE)
Referee Observer: Vadims Direktorenko (LVA)
AZ Alkmaar – Viktoria Plzen
Referee: Luis Godinho (POR)
Assistant Referee 1: Rui Teixeira (POR)
Assistant Referee 2: Luis Campos (POR)
Fourth Official: Andre Narciso (POR)
Referee Observer: Matteo Trefoloni (ITA)
Qarabağ – Sheriff Tiraspol
Referee: Furkat Atazhanov (KAZ)
Assistant Referee 1: Sergey Kalachyov (KAZ)
Assistant Referee 2: Darkhan Tulegenov (KAZ)
Fourth Official: Grigoriy Moskovchenko (KAZ)
Referee Observer: Michal Beneš (CZE)
Celje – Molde
Referee: Jochem Kamphuis (NED)
Assistant Referee 1: Jan de Vries (NED)
Assistant Referee 2: Joost van Zuilen (NED)
Fourth Official: Siemen Mulder (NED)
Referee Observer: Kóstas Kapitanís (CYP)
Suduva – Maccabi Tel Aviv
Referee: Rade Obrenovič (SVN)
Assistant Referee 1: Matej Žunič (SVN)
Assistant Referee 2: Grega Kordež (SVN)
Fourth Official: David Smajc (SVN)
Referee Observer: Marian Ružbarsky (SVK)
Lokomotiva Zagreb – Rapid Wien
Referee: Juan Martinez Munuera (ESP)
Assistant Referee 1: Roberto Alonso Fernandez (ESP)
Assistant Referee 2: Miguel Martinez Munuera (ESP)
Fourth Official: Santiago Jaime Latre (ESP)
Referee Observer: Stephane Lannoy (FRA)
Ludogorets – Midtjylland
Referee: Denys Shurman (UKR)
Assistant Referee 1: Oleksandr Korniyko (UKR)
Assistant Referee 2: Oleksandr Zhukov (UKR)
Fourth Official: Mykola Kryvonosov (UKR)
Referee Observer: Miroslav Tulinger (CZE)
Dinama Brest – Sarajevo
Referee: Loukas Sotiriou (CYP)
Assistant Referee 1: Charalampos Georgiou (CYP)
Assistant Referee 2: Nikos Egglezou (CYP)
Fourth Official: Vasilis Dimitriou (CYP)
Referee Observer: Stefano Podeschi (SMR)
Legia Warszawa – Omonia
Referee: Nathan Verboomen (BEL)
Assistant Referee 1: Mathias Hillaert (BEL)
Assistant Referee 2: Ruben Wyns (BEL)
Fourth Official: Erik Lambrechts (BEL)
Referee Observer: Vitor Melo Pereira (POR)
CFR Cluj – Dinamo Zagreb
Referee: Antonio Nobre (POR)
Assistant Referee 1: Bruno Jesus (POR)
Assistant Referee 2: Nuno Pereira (POR)
Fourth Official: Joao Bento (POR)
Referee Observer: William Young (SCO)
Young Boys – KI/Slovan Bratislava
Referee: Athanasios Tzilos (GRE)
Assistant Referee 1: Vasileios Nikolakakis (GRE)
Assistant Referee 2: Andreas Meintanas (GRE)
Fourth Official: Dimitrios Karantonis (GRE)
Referee Observer: Vladimír Medved (SVK)
Celtic – Ferencvaros
Referee: Allard Lindhout (NED)
Assistant Referee 1: Charles Schaap (NED)
Assistant Referee 2: Bas van Dongen (NED)
Fourth Official: Jeroen Manschot (NED)
Referee Observer: Terje Hauge (NOR)