6-7 August 2019 PAOK – Ajax
Referee: Slavko Vinčič (SVN, photo)
Assistant Referee 1: Tomaž Klančnik (SVN)
Assistant Referee 2: Andraž Kovačič (SVN)
Fourth Official: Rade Obrenovič (SVN)
Referee Observer: Peter Fröjdfeldt (SWE)
Apoel – Qarabağ
Referee: Davide Massa (ITA)
Assistant Referee 1: Fabiano Preti (ITA)
Assistant Referee 2: Alberto Tegoni (ITA)
Fourth Official: Rosario Abisso (ITA)
Referee Observer: Vladimir Antonov (MDA)
GNK Dinamo – Ferencvárosi TC
Referee: Pawel Raczkowski (POL)
Assistant Referee 1: Michal Obukowicz (POL)
Assistant Referee 2: Radoslaw Siejka (POL)
Fourth Official: Tomasz Musial (POL)
Referee Observer: Vítor Melo Pereira (POR)
Club Brugge – Dynamo Kyiv
Referee: Xavier Estrada Fernández (ESP)
Assistant Referee 1: Roberto Alonso Fernández (ESP)
Assistant Referee 2: José Naranjo Pérez (ESP)
Fourth Official: Pablo González Fuertes (ESP)
Referee Observer: Darko Čeferin (SVN)
Crvena Zvezda – FC København
Referee: Tiago Martins (POR)
Assistant Referee 1: Rui Teixeira (POR)
Assistant Referee 2: Pedro Mota (POR)
Fourth Official: André Narciso (POR)
Referee Observer: Ichko Lozev (BUL)
FC Krasnodar – FC Porto
Referee: Tobias Stieler (GER)
Assistant Referee 1: Christian Gittelmann (GER)
Assistant Referee 2: Rafael Foltyn (GER)
Fourth Official: Christian Dingert (GER)
Referee Observer: Karen Nalbandyan (ARM)
Medipol Başakşehir – Olympiakós FC
Referee: Orel Grinfeld (ISR)
Assistant Referee 1: Roi Hasan (ISR)
Assistant Referee 2: Idan Yarkoni (ISR)
Fourth Official: Eitan Shmuelevitz (ISR)
Referee Observer: Tomasz Mikulski (POL)
CFR Cluj – Celtic FC
Referee: Srdjan Jovanović (SRB)
Assistant Referee 1: Uroš Stojković (SRB)
Assistant Referee 2: Milan Mihajlović (SRB)
Fourth Official: Novak Simović (SRB)
Referee Observer: Francesco Bianchi (SUI)
FC Basel – LASK
Referee: Andreas Ekberg (SWE)
Assistant Referee 1: Mehmet Culum (SWE)
Assistant Referee 2: Stefan Hallberg (SWE)
Fourth Official: Kristoffer Karlsson (SWE)
Referee Observer: Juan Fernández Marín (ESP)
NK Maribor – Rosenborg BK
Referee: François Letexier (FRA)
Assistant Referee 1: Cyril Mugnier (FRA)
Assistant Referee 2: Mehdi Rahmouni (FRA)
Fourth Official: Willy Delajod (FRA)
Referee Observer: Levan Paniashvili (GEO)
