16 August 2018
Dinamo Brest – Apollon Limassol
Referee: Martin Strömbergsson (SWE, photo)
Assistant Referee 1: Daniel Gustavsson (SWE)
Assistant Referee 2: Joakim Nilsson (SWE)
Fourth Official: Patrik Eriksson (SWE)
Referee Observer: Petteri Kari (FIN)
Basel – Vitesse
Referee: Daniel Siebert (GER)
Assistant Referee 1: Jan Seidel (GER)
Assistant Referee 2: Lasse Koslowski (GER)
Fourth Official: Sascha Stegemann (GER)
Referee Observer: Karen Nalbandyan (ARM)
Kairat Almaty – Sigma Olomouc
Referee: Sandro Schärer (SUI)
Assistant Referee 1: Sladan Josipovic (SUI)
Assistant Referee 2: Bekim Zogaj (SUI)
Fourth Official: Fedayi San (SUI)
Referee Observer: Thomas Einwaller (AUT)
AEK Larnaca – Sturm Graz
Referee: Paolo Valeri (ITA)
Assistant Referee 1: Elenito Di Liberatore (ITA)
Assistant Referee 2: Daniele Bindoni (ITA)
Fourth Official: Maurizio Mariani (ITA)
Referee Observer: Goran Mihajlević (MNE)
HJK Helsinki – Olimpija Ljubljana
Referee: Yevheniy Aranovskyy (UKR)
Assistant Referee 1: Serhiy Bekker (UKR)
Assistant Referee 2: Oleh Pluzhnyk (UKR)
Fourth Official: Anatoliy Abdula (UKR)
Referee Observer: Ingi Jónsson (ISL)
FC København – CSKA Sofia
Referee: Halil Umut Meler (TUR)
Assistant Referee 1: Ekrem Kan (TUR)
Assistant Referee 2: İbrahim Uyarcan (TUR)
Fourth Official: Arda Kardeşler (TUR)
Referee Observer: Jan Wegereef (NED)
U Craiova – RB Leipzig
Referee: Miroslav Zelinka (CZE)
Assistant Referee 1: Ondřej Pelikán (CZE)
Assistant Referee 2: Jan Paták (CZE)
Fourth Official: Emanuel Marek (CZE)
Referee Observer: Shmuel Shteif (ISR)
FC Zenit – Dinamo Minsk
Referee: Sébastien Delferière (BEL)
Assistant Referee 1: Yves De Neve (BEL)
Assistant Referee 2: Jo De Weirdt (BEL)
Fourth Official: Wim Smet (BEL)
Referee Observer: Elmir Pilav (BIH)
Molde – Hibernian
Referee: Dennis Higler (NED)
Assistant Referee 1: Joost van Zuilen (NED)
Assistant Referee 2: Johan Balder (NED)
Fourth Official: Martin van den Kerkhof (NED)
Referee Observer: Nicolae Grigorescu (ROU)
Žalgiris Vilnius – Sevilla FC
Referee: Enea Jorgji (ALB)
Assistant Referee 1: Ridiger Çokaj (ALB)
Assistant Referee 2: Rejdi Avdo (ALB)
Fourth Official: Andi Koçi (ALB)
Referee Observer: Michális Argyroú (CYP)
Progrès Niederkorn – FC Ufa
Referee: Manuel Schüttengruber (AUT)
Assistant Referee 1: Roland Brandner (AUT)
Assistant Referee 2: Robert Steinacher (AUT)
Fourth Official: Dieter Muckenhammer (AUT)
Referee Observer: Stefano Podeschi (SMR)
CFR Cluj – Alashkert FC
Referee: Vilhjálmur Thórarinsson (ISL)
Assistant Referee 1: Gylfi Sigurdsson (ISL)
Assistant Referee 2: Birkir Sigurdarson (ISL)
Fourth Official: Ívar Kristjánsson (ISL)
Referee Observer: Bernardino González Vázquez (ESP)
FK Sūduva – Spartaks Jūrmala
Referee: Ola Hobber Nilsen (NOR)
Assistant Referee 1: Tom Harald Grønevik (NOR)
Assistant Referee 2: Geir Oskar Isaksen (NOR)
Fourth Official: Kai Erik Steen (NOR)
Referee Observer: Pavel Saliy (KAZ)
FC Midtjylland – The New Saints
Referee: Irfan Peljto (BIH)
Assistant Referee 1: Davor Beljo (BIH)
Assistant Referee 2: Amer Macić (BIH)
Fourth Official: Admir Šehović (BIH)
Referee Observer: Leslie Irvine (NIR)
Apoel – Hapoel Beer Sheva
Referee: Mattias Gestranius (FIN)
Assistant Referee 1: Jan-Peter Aravirta (FIN)
Assistant Referee 2: Mikko Alakare (FIN)
Fourth Official: Antti Munukka (FIN)
Referee Observer: Dejan Filipović (SRB)
FK Kukësi – Torpedo Kutaisi
Referee: Alain Bieri (SUI)
Assistant Referee 1: Alain Heiniger (SUI)
Assistant Referee 2: Matthias Sbrissa (SUI)
Fourth Official: Pascal Erlachner (SUI)
Referee Observer: Volodymyr Petrov (UKR)
Maccabi Tel Aviv – FC Pyunik
Referee: Ville Nevalainen (FIN)
Assistant Referee 1: Ville Koskiniemi (FIN)
Assistant Referee 2: Mika Lamppu (FIN)
Fourth Official: Petri Viljanen (FIN)
Referee Observer: Michális Koukoulákis (GRE)
Luzern – Olympiakós
Referee: Kirill Levnikov (RUS)
Assistant Referee 1: Aleksey Vorontsov (RUS)
Assistant Referee 2: Aram Petrosyan (RUS)
Fourth Official: Roman Galimov (RUS)
Referee Observer: Jørn West Larsen (DEN)
LASK Linz – Beşiktaş JK
Referee: Nikola Dabanović (MNE)
Assistant Referee 1: Jovica Tatar (MNE)
Assistant Referee 2: Aleksandar Đikanović (MNE)
Fourth Official: Vojin Vojinović (MNE)
Referee Observer: William Young (SCO)
Atalanta BC – Hapoel Haifa
Referee: Frank Schneider (FRA)
Assistant Referee 1: Bertrand Jouannaud (FRA)
Assistant Referee 2: Djemel Zitouni (FRA)
Fourth Official: Johan Hamel (FRA)
Referee Observer: Erol Ersoy (TUR)
Brøndby IF – Spartak Subotica
Referee: Hüseyin Göçek (TUR)
Assistant Referee 1: Mustafa Eyisoy (TUR)
Assistant Referee 2: Kemal Yılmaz (TUR)
Fourth Official: Ümit Öztürk (TUR)
Referee Observer: Paulius Malžinskas (LTU)
HŠK Zrinjski – PFC Ludogorets
Referee: Bas Nijhuis (NED)
Assistant Referee 1: Rob van de Ven (NED)
Assistant Referee 2: Jan de Vries (NED)
Fourth Official: Allard Lindhout (NED)
Referee Observer: Gerard Perry (IRL)
F91 Dudelange – Legia Warszawa
Referee: Ivaylo Stoyanov (BUL)
Assistant Referee 1: Martin Venev (BUL)
Assistant Referee 2: Ivo Kolev (BUL)
Fourth Official: Volen Chinkov (BUL)
Referee Observer: Lassin Isaksen (FRO)
Lech Poznań – KRC Genk
Referee: Marco Guida (ITA)
Assistant Referee 1: Mauro Tonolini (ITA)
Assistant Referee 2: Mauro Vivenzi (ITA)
Fourth Official: Piero Giacomelli (ITA)
Referee Observer: Muharrem Aksoy (TUR)
NK Maribor – Rangers FC
Referee: Jonathan Lardot (BEL)
Assistant Referee 1: Frédéric Godelaine (BEL)
Assistant Referee 2: Florian Lemaire (BEL)
Fourth Official: Nathan Verboomen (BEL)
Referee Observer: Alain Hamer (LUX)
Partizan – Nordsjaelland
Referee: Kristo Tohver (EST)
Assistant Referee 1: Silver Kõiv (EST)
Assistant Referee 2: Aron Härsing (EST)
Fourth Official: Juri Frischer (EST)
Referee Observer: Stephen Lodge (ENG)
FCSB – Hajduk Split
Referee: Juan Martínez Munuera (ESP)
Assistant Referee 1: Diego Barbero Sevilla (ESP)
Assistant Referee 2: César Noval Font (ESP)
Fourth Official: Mario Melero López (ESP)
Referee Observer: Kristinn Jakobsson (ISL)
Rapid Wien – Slovan Bratislava
Referee: Davide Massa (ITA)
Assistant Referee 1: Filippo Meli (ITA)
Assistant Referee 2: Gianluca Vuoto (ITA)
Fourth Official: Fabio Maresca (ITA)
Referee Observer: Draženko Kovačić (CRO)
Feyenoord – Trenčín
Referee: Jakob Kehlet (DEN)
Assistant Referee 1: Henrik Larsen (DEN)
Assistant Referee 2: Heine Sørensen (DEN)
Fourth Official: Jens Grabski Maae (DEN)
Referee Observer: Iain Robertson Brines (SCO)
KAA Gent – Jagiellonia Białystok
Referee: Bastian Dankert (GER)
Assistant Referee 1: Mike Pickel (GER)
Assistant Referee 2: René Rohde (GER)
Fourth Official: Benjamin Cortus (GER)
Referee Observer: Jon Skjervold (NOR)
HNK Rijeka – Sarpsborg FF
Referee: Donatas Rumšas (LTU)
Assistant Referee 1: Aleksandr Radiuš (LTU)
Assistant Referee 2: Vytis Snarskis (LTU)
Fourth Official: Robertas Valikonis (LTU)
Referee Observer: Jouni Hyytiä (FIN)
Burnley FC – İstanbul Başakşehir
Referee: István Kovács (ROU)
Assistant Referee 1: Vasile Marinescu (ROU)
Assistant Referee 2: Mihai Artene (ROU)
Fourth Official: Marius Avram (ROU)
Referee Observer: Guy Goethals (BEL)
Girondins de Bordeaux – FC Mariupol
Referee: Andrew Dallas (SCO)
Assistant Referee 1: Graeme Stewart (SCO)
Assistant Referee 2: Jordan Stokoe (SCO)
Fourth Official: Nicolas Walsh (SCO)
Referee Observer: Frank De Bleeckere (BEL)
Rosenborg – Cork City
Referee: Mads-Kristoffer Kristoffersen (DEN)
Assistant Referee 1: Lars Hummelgaard (DEN)
Assistant Referee 2: Victor Skytte (DEN)
Fourth Official: Michael Tykgaard (DEN)
Referee Observer: Kóstas Kapitanís (CYP)
Valur Reykjavík – Sheriff Tiraspol
Referee: Marco Fritz (GER)
Assistant Referee 1: Eduard Beitinger (GER)
Assistant Referee 2: Dominik Schaal (GER)
Fourth Official: Martin Petersen (GER)
Referee Observer: Peter Fröjdfeldt (SWE)
SC Braga – Zorya Luhansk
Referee: Aleksandar Stavrev (MKD)
Assistant Referee 1: Dejan Kostadinov (MKD)
Assistant Referee 2: Goce Petreski (MKD)
Fourth Official: Dejan Jakimovski (MKD)
Referee Observer: Gylfi Thór Orrason (ISL)