7-9 August 2018İstanbul Başakşehir – Burnley FC
Referee: Srdjan Jovanović (SRB, photo)
Assistant Referee 1: Uroš Stojković (SRB)
Assistant Referee 2: Milan Mihajlović (SRB)
Fourth Official: Ilija Brdar (SRB)
Referee Observer: Vítor Melo Pereira (POR)
FC Pyunik – Maccabi Tel Aviv
Referee: Pol van Boekel (NED)
Assistant Referee 1: Davie Goossens (NED)
Assistant Referee 2: Joost van Zuilen (NED)
Fourth Official: Edwin van de Graaf (NED)
Referee Observer: Geórgios Bíkas (GRE)
FC Ufa – Progrès Niederkorn
Referee: Stephan Klossner (SUI)
Assistant Referee 1: Marco Zürcher (SUI)
Assistant Referee 2: Jean-Yves Wicht (SUI)
Fourth Official: Urs Schnyder (SUI)
Referee Observer: Vadims Direktorenko (LVA)
Hapoel Haifa – Atalanta BC
Referee: Harald Lechner (AUT)
Assistant Referee 1: Andreas Heidenreich (AUT)
Assistant Referee 2: Maximilian Kolbitsch (AUT)
Fourth Official: Julian Weinberger (AUT)
Referee Observer: Sokol Jareci (ALB)
Alashkert FC – CFR Cluj
Referee: Serhiy Boyko (UKR)
Assistant Referee 1: Viktor Matyash (UKR)
Assistant Referee 2: Oleksandr Voytyuk (UKR)
Fourth Official: Mykola Balakin (UKR)
Referee Observer: Miroslav Vitković (CRO)
Spartaks Jūrmala – FK Sūduva
Referee: Thorvaldur Árnason (ISL)
Assistant Referee 1: Gunnar Gudmundsson (ISL)
Assistant Referee 2: Birkir Sigurdarson (ISL)
Fourth Official: Thóroddur Hjaltalín (ISL)
Referee Observer: Karel Bohuněk (CZE)
RB Leipzig – U Craiova
Referee: Paweł Gil (POL)
Assistant Referee 1: Konrad Sapela (POL)
Assistant Referee 2: Marcin Borkowski (POL)
Fourth Official: Krzysztof Jakubik (POL)
Referee Observer: Raymond Ellingham (WAL)
Dinamo Minsk – FC Zenit
Referee: Anastásios Papapétrou (GRE)
Assistant Referee 1: Trýfon Petrópoulos (GRE)
Assistant Referee 2: Vasílios Kamboúris (GRE)
Fourth Official: Ángelos Evángelou (GRE)
Referee Observer: Tomasz Mikulski (POL)
Sturm Graz – AEK Larnaca
Referee: Mohammed Al-Hakim (SWE)
Assistant Referee 1: Peter Magnusson (SWE)
Assistant Referee 2: Fredrik Klyver (SWE)
Fourth Official: Magnus Lindgren (SWE)
Referee Observer: Emil Božinovski (MKD)
Sigma Olomouc – Kairat Almaty
Referee: Massimiliano Irrati (ITA)
Assistant Referee 1: Fabiano Preti (ITA)
Assistant Referee 2: Stefano Liberti (ITA)
Fourth Official: Gianpaolo Calvarese (ITA)
Referee Observer: Rune Pedersen (NOR)
Mariupol – Girondins de Bordeaux
Referee: Ivan Bebek (CRO)
Assistant Referee 1: Tomislav Petrović (CRO)
Assistant Referee 2: Miro Grgić (CRO)
Fourth Official: Marin Vidulin (CRO)
Referee Observer: David Malcolm (NIR)
AS Trenčín – Feyenoord
Referee: Robert Schörgenhofer (AUT)
Assistant Referee 1: Markus Gutschi (AUT)
Assistant Referee 2: Andreas Staudinger (AUT)
Fourth Official: Walter Altmann (AUT)
Referee Observer: Alieh Čykun (BLR)
Apollon Limassol – Dinamo Brest
Referee: Carlos Xistra (POR)
Assistant Referee 1: Nuno Pereira (POR)
Assistant Referee 2: Álvaro Mesquita (POR)
Fourth Official: João Capela (POR)
Referee Observer: Vasyl Melnychuk (UKR)
PFC Ludogorets – HŠK Zrinjski
Referee: Vitaliy Meshkov (RUS)
Assistant Referee 1: Anton Averyanov (RUS)
Assistant Referee 2: Rashid Abusuyev (RUS)
Fourth Official: Sergey Lapochkin (RUS)
Referee Observer: Drago Kos (SVN)
Sheriff Tiraspol – Valur Reykjavík
Referee: Arnold Hunter (NIR)
Assistant Referee 1: Richard Storey (NIR)
Assistant Referee 2: David Anderson (NIR)
Fourth Official: Tim Marshall (NIR)
Referee Observer: Marco Borg (MLT)
Hapoel Beer Sheva – Apoel FC
Referee: Aleksey Eskov (RUS)
Assistant Referee 1: Dmitriy Mosyakin (RUS)
Assistant Referee 2: Dmitriy Safyan (RUS)
Fourth Official: Vladimir Moskalev (RUS)
Referee Observer: Ján Fašung (SVK)
Torpedo Kutaisi – FK Kukësi
Referee: Alan Sant (MLT)
Assistant Referee 1: Edward Spiteri (MLT)
Assistant Referee 2: Roberto Vella (MLT)
Fourth Official: Matthew De Gabriele (MLT)
Referee Observer: Aleksey Spirin (RUS)
Jagiellonia Białystok – KAA Gent
Referee: Ali Palabıyık (TUR)
Assistant Referee 1: Kerem Ersoy (TUR)
Assistant Referee 2: Serkan Olguncan (TUR)
Fourth Official: Koray Gençerler (TUR)
Referee Observer: Alexandru Deaconu (ROU)
Nordsjaelland – Partizan
Referee: Alejandro Hernández Hernández (ESP)
Assistant Referee 1: Teodoro Sobrino Magán (ESP)
Assistant Referee 2: José Naranjo Pérez (ESP)
Fourth Official: José Munuera Montero (ESP)
Referee Observer: António Almeida (POR)
CSKA Sofia – FC København
Referee: Bart Vertenten (BEL)
Assistant Referee 1: Rien Vanyzere (BEL)
Assistant Referee 2: Thibaud Nijssen (BEL)
Fourth Official: Bram Van Driessche (BEL)
Referee Observer: Manuel Díaz Vega (ESP)
KRC Genk – Lech Poznań
Referee: Marius Avram (ROU)
Assistant Referee 1: Valentin Avram (ROU)
Assistant Referee 2: Mircea Orbuleț (ROU)
Fourth Official: Horațiu Feșnic (ROU)
Referee Observer: Zoran Petrović (SRB)
Vitesse – Basel
Referee: Georgi Kabakov (BUL)
Assistant Referee 1: Martin Margaritov (BUL)
Assistant Referee 2: Diyan Valkov (BUL)
Fourth Official: Nikola Popov (BUL)
Referee Observer: László Vágner (HUN)
Olympiakos – Luzern
Referee: François Letexier (FRA)
Assistant Referee 1: Cyril Mugnier (FRA)
Assistant Referee 2: Mehdi Rahmouni (FRA)
Fourth Official: Thomas Léonard (FRA)
Referee Observer: Eugen Strigel (GER)
Beşiktaş JK – LASK Linz
Referee: Bartosz Frankowski (POL)
Assistant Referee 1: Marcin Boniek (POL)
Assistant Referee 2: Jakub Winkler (POL)
Fourth Official: Zbigniew Dobrynin (POL)
Referee Observer: Matteo Trefoloni (ITA)
Olimpija Ljubljana – HJK Helsinki
Referee: Benoît Millot (FRA)
Assistant Referee 1: Frédéric Haquette (FRA)
Assistant Referee 2: Stephan Luzi (FRA)
Fourth Official: Éric Wattellier (FRA)
Referee Observer: Robert Małek (POL)
Zorya Luhansk – SC Braga
Referee: Tobias Welz (GER)
Assistant Referee 1: Eduard Beitinger (GER)
Assistant Referee 2: Martin Thomsen (GER)
Fourth Official: Sören Storks (GER)
Referee Observer: Edward Foley (IRL)
Sarpsborg – Rijeka
Referee: Kevin Clancy (SCO)
Assistant Referee 1: David McGeachie (SCO)
Assistant Referee 2: Douglas Ross (SCO)
Fourth Official: Donald Robertson (SCO)
Referee Observer: Bo Karlsson (SWE)
Hibernian – Molde
Referee: Ádám Farkas (HUN)
Assistant Referee 1: Péter Kóbor (HUN)
Assistant Referee 2: Balázs Szert (HUN)
Fourth Official: Ferenc Karakó (HUN)
Referee Observer: Cyril Zimmermann (SUI)
Hajduk Split – FCSB
Referee: Tiago Martins (POR)
Assistant Referee 1: Luís Campos (POR)
Assistant Referee 2: Pedro Almeida (POR)
Fourth Official: Hugo Miguel (POR)
Referee Observer: Nikolay Ivanov (RUS)
Rangers – Maribor
Referee: Roy Reinshreiber (ISR)
Assistant Referee 1: Danny Krasikow (ISR)
Assistant Referee 2: David Biton (ISR)
Fourth Official: Eitan Shmuelevitz (ISR)
Referee Observer: Jaap Uilenberg (NED)
Spartak Subotica – Brøndby IF
Referee: Kevin Blom (NED)
Assistant Referee 1: Rob van de Ven (NED)
Assistant Referee 2: Charles Schaap (NED)
Fourth Official: Siemen Mulder (NED)
Referee Observer: Gaetano De Gabriele (MLT)
Cork City – Rosenborg
Referee: Petr Ardeleánu (CZE)
Assistant Referee 1: Tomáš Mokrusch (CZE)
Assistant Referee 2: Jakub Hrabovský (CZE)
Fourth Official: Karel Hrubeš (CZE)
Referee Observer: Ioánnis Tsachilídis (GRE)
The New Saints – FC Midtjylland
Referee: Peter Královič (SVK)
Assistant Referee 1: Miroslav Benko (SVK)
Assistant Referee 2: Erik Weiss (SVK)
Fourth Official: Boris Marhefka (SVK)
Referee Observer: Helmut Fleischer (GER)
Legia Warszawa – Dudelange
Referee: Halis Özkahya (TUR)
Assistant Referee 1: Ekrem Kan (TUR)
Assistant Referee 2: Hakan Yemişken (TUR)
Fourth Official: Alper Ulusoy (TUR)
Referee Observer: Jari Maisonlahti (FIN)
Slovan Bratislava – Rapid Wien
Referee: Paweł Raczkowski (POL)
Assistant Referee 1: Michał Obukowicz (POL)
Assistant Referee 2: Radosław Siejka (POL)
Fourth Official: Tomasz Musiał (POL)
Referee Observer: Jens Larsen (DEN)
Sevilla FC – Žalgiris Vilnius
Referee: Bojan Pandzic (SWE)
Assistant Referee 1: Magnus Sjöblom (SWE)
Assistant Referee 2: Mikael Hallin (SWE)
Fourth Official: Kaspar Sjöberg (SWE)
Referee Observer: Miroslav Tulinger (CZE)