23-24 July 2019
Viktoria Plzeň – Olympiakós FC
Referee: Marco Guida (ITA, photo)
Assistant Referee 1: Ciro Carbone (ITA)
Assistant Referee 2: Daniele Bindoni (ITA)
Fourth Official: Fabio Maresca (ITA)
Referee Observer: Murat Ilgaz (TUR)
FC Saburtalo – GNK Dinamo
Referee: Petr Ardeleanu (CZE)
Assistant Referee 1: Ivo Nádvorník (CZE)
Assistant Referee 2: Jakub Hrabovský (CZE)
Fourth Official: Karel Hrubeš (CZE)
Referee Observer: Sándor Piller (HUN)
The New Saints – FC København
Referee: Alexander Harkam (AUT)
Assistant Referee 1: Andreas Witschnigg (AUT)
Assistant Referee 2: Andreas Staudinger (AUT)
Fourth Official: Christian Ciochirca (AUT)
Referee Observer: Leslie Irvine (NIR)
PSV Eindhoven – FC Basel
Referee: Andris Treimanis (LVA)
Assistant Referee 1: Haralds Gudermanis (LVA)
Assistant Referee 2: Aleksejs Spasjonņikovs (LVA)
Fourth Official: Aleksandrs Golubevs (LVA)
Referee Observer: Frank De Bleeckere (BEL)
FK Sutjeska – Apoel FC
Referee: István Vad (HUN)
Assistant Referee 1: István Albert (HUN)
Assistant Referee 2: Péter Berettyán (HUN)
Fourth Official: Balázs Berke (HUN)
Referee Observer: Sergey Zuyev (RUS)
Bate Barysaŭ – Rosenborg BK
Referee: Sandro Schärer (SUI)
Assistant Referee 1: Bekim Zogaj (SUI)
Assistant Referee 2: Devis Dettamanti (SUI)
Fourth Official: Lionel Tschudi (SUI)
Referee Observer: Jan Wegereef (NED)
CFR Cluj – Maccabi Tel Aviv
Referee: José Sánchez Martínez (ESP)
Assistant Referee 1: Raúl Cabañero Martínez (ESP)
Assistant Referee 2: José Gallego García (ESP)
Fourth Official: Santiago Jaime Latre (ESP)
Referee Observer: Markus Nobs (SUI)
Ferencvárosi TC – Valletta FC
Referee: Radu Petrescu (ROU)
Assistant Referee 1: Radu Ghinguleac (ROU)
Assistant Referee 2: Vladimir Urzică (ROU)
Fourth Official: Marcel Bîrsan (ROU)
Referee Observer: Jørn West Larsen (DEN)
NK Maribor – AIK Stockholm
Referee: Sascha Stegemann (GER)
Assistant Referee 1: Marco Achmüller (GER)
Assistant Referee 2: Thorben Siewer (GER)
Fourth Official: Harm Osmers (GER)
Referee Observer: Manuel López Fernández (ESP)
Dundalk FC – Qarabağ FK
Referee: Bartosz Frankowski (POL)
Assistant Referee 1: Marcin Boniek (POL)
Assistant Referee 2: Jakub Winkler (POL)
Fourth Official: Daniel Stefański (POL)
Referee Observer: Peter Fröjdfeldt (SWE)
Celtic FC – Nõmme Kalju
Referee: Jakob Kehlet (DEN)
Assistant Referee 1: Lars Hummelgaard (DEN)
Assistant Referee 2: Heine Sørensen (DEN)
Fourth Official: Michael Tykgaard (DEN)
Referee Observer: Bo Karlsson (SWE)
Crvena Zvezda – HJK Helsinki
Referee: Pawel Gil (POL)
Assistant Referee 1: Konrad Sapela (POL)
Assistant Referee 2: Marcin Borkowski (POL)
Fourth Official: Tomasz Kwiatkowski (POL)
Referee Observer: Rien Koopman (NED)