12-13 July 2017Progrès Niederkorn – AEL Limassol
Referee: Massimiliano Irrati (ITA, photo)
Assistant Referee 1: Fabiano Preti (ITA)
Assistant Referee 2: Filippo Valeriani (ITA)
Fourth Official: Luca Pairetto (ITA)
Referee Observer: Georgios Bikas (GRE)
İnter Baku – Fola Esch
Referee: Eitan Shmuelevitz (ISR)
Assistant Referee 1: Sagy Metzamber ISR)
Assistant Referee 2: Nissan Davidy (ISR)
Fourth Official: Daniel Natan (ISR)
Referee Observer: Oguz Sarvan (TUR)
Irtysh Pavlodar – Crvena Zvezda
Referee: Marius Avram (ROU)
Assistant Referee 1: Valentin Avram (ROU)
Assistant Referee 2: Cristian Orbuleț (ROU)
Fourth Official: István Kovács (ROU)
Referee Observer: René Temmink (NED)
Kairat Almaty – KS Skënderbeu
Referee: Leontios Trattou (CYP)
Assistant Referee 1: Michael Soteriou (CYP)
Assistant Referee 2: Athinodoros Ioannou (CYP)
Fourth Official: Avraam Tsoukas (CYP)
Referee Observer: Vadims Direktorenko (LVA)
Maccabi Tel Aviv – KR Reykjavik
Referee: Anastasios Papapetrou (GRE)
Assistant Referee 1: Ioannis Toumpakaris (GRE)
Assistant Referee 2: Ilias Alexeas (GRE)
Fourth Official: Aggelos Evangelou (GRE)
Referee Observer: Drago Kos (SVN)
KF Škendija – HJK Helsinki
Referee: Markus Hameter (AUT)
Assistant Referee 1: Roland Rieder (AUT)
Assistant Referee 2: Christian Rigler (AUT)
Fourth Official: Rene Eisner (AUT)
Referee Observer: Nikolai Levnikov (RUS)
MFK Ružomberok – SK Brann
Referee: Kevin Clancy (SCO)
Assistant Referee 1: David McGeachie (SCO)
Assistant Referee 2: Jordan Stokoe (SCO)
Fourth Official: Robert Madden (SCO)
Referee Observer: Lassin Isaksen (FRO)
FK Rabotnicki – Dinamo Minsk
Referee: Arnold Hunter (NIR)
Assistant Referee 1: Richard Storey (NIR)
Assistant Referee 2: David Anderson (NIR)
Fourth Official: Lee Philip Tavinder (NIR)
Referee Observer: Petteri Kari (FIN)
Nõmme Kalju – Videoton FC
Referee: Joao Capela (POR)
Assistant Referee 1: Ricardo Ferreira (POR)
Assistant Referee 2: Sergio Teixeira (POR)
Fourth Official: Luís Godinho (POR)
Referee Observer: Luc Wilmes (LUX)
SCR Altach – Dinamo Brest
Referee: Luca Barbeno (SMR)
Assistant Referee 1: Francesco Lunardon (SMR)
Assistant Referee 2: Salvatore Tuttifrutti (SMR)
Fourth Official: Raffaele Delvecchio (SMR)
Referee Observer: Emil Bozhinovski (MKD)
Brøndby IF – VPS Vaasa
Referee: Bart Vertenten (BEL)
Assistant Referee 1: Rien Vanyzere (BEL)
Assistant Referee 2: Yves De Neve (BEL)
Fourth Official: Bram Van Driessche (BEL)
Referee Observer: Raymond Ellingham (WAL)
Liepāja – Sūduva
Referee: Erez Papir (ISR)
Assistant Referee 1: Dvir Shimon (ISR)
Assistant Referee 2: Igor Shilnikov (ISR)
Fourth Official: Yigal Frid (ISR)
Referee Observer: Bernardino González Vázquez (ESP)
Beitar Jerusalem – Botev Plovdiv
Referee: Bartosz Frankowski (POL)
Assistant Referee 1: Marcin Boniek (POL)
Assistant Referee 2: Jakub Winkler (POL)
Fourth Official: Krzysztof Jakubik (POL)
Referee Observer: Dušan Krchňák (SVK)
FC Vaduz – Odds BK
Referee: Antti Munukka (FIN)
Assistant Referee 1: Jukka Honkanen (FIN)
Assistant Referee 2: Mikko Alakare (FIN)
Fourth Official: Marko Grönholm (FIN)
Referee Observer: Ferenc Székely (HUN)
Östersunds – Galatasaray
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: Guy Goethals (BEL)
FK Qabala – Jagiellonia Białystok
Referee: Marco Fritz (GER)
Assistant Referee 1: Holger Henschel (GER)
Assistant Referee 2: Marcel Pelgrim (GER)
Fourth Official: Guido Winkmann (GER)
Referee Observer: Erol Ersoy (TUR)
FK Haugesund – Lech Poznań
Referee: Alain Bieri (SUI)
Assistant Referee 1: Alain Heiniger (SUI)
Assistant Referee 2: Christopher Chaillet (SUI)
Fourth Official: Stephan Klossner (SUI)
Referee Observer: Antonio Almeida Costa (POR)
Apollon Limassol – Zaria Balti
Referee: Ádam Farkas (HUN)
Assistant Referee 1: István Albert (HUN)
Assistant Referee 2: Balázs Szert (HUN)
Fourth Official: Péter Solymosi (HUN)
Referee Observer: Vladimir Medved (SVK)
Valletta – Utrecht
Referee: Ognjen Valjić (BIH)
Assistant Referee 1: Senad Ibrišimbegović (BIH)
Assistant Referee 2: Sreten Udovičić (BIH)
Fourth Official: Admir Šehović (BIH)
Referee Observer: Michael Ross (NIR)
Astra Giurgiu – PFC Zire
Referee: Siarhei Tsynkevich (BLR)
Assistant Referee 1: Yauheni Ramanau (BLR)
Assistant Referee 2: Vitali Maliutsin (BLR)
Fourth Official: Viktar Shymusik (BLR)
Referee Observer: Jiri Ulrich (CZE)
IFK Norrköping – FK Trakai
Referee: Amaury Delerue (FRA)
Assistant Referee 1: Bertrand Jouannaud (FRA)
Assistant Referee 2: Michael Annonier (FRA)
Fourth Official: Olivier Thual FRA)
Referee Observer: Vítor Melo Pereira (POR)
Slovan Bratislava – Lyngby
Referee: Nenad Djokić (SRB)
Assistant Referee 1: Nemanja Petrović (SRB)
Assistant Referee 2: Vladimir Jovanović (SRB)
Fourth Official: Zoran Široki (SRB)
Referee Observer: Neale Barry (ENG)
AS Trenčín – Bnei Yehuda 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: Sándor Piller (HUN)
Sturm Graz – Mladost Podgorica
Referee: Mattias Gestranius (FIN)
Assistant Referee 1: Jan-Peter Aravirta (FIN)
Assistant Referee 2: Ville Koskiniemi (FIN)
Fourth Official: Dennis Antamo (FIN)
Referee Observer: Rune Pedersen (NOR)
Hajduk Split – Levski Sofia
Referee: Mohammed Al-Hakim (SWE)
Assistant Referee 1: Daniel Gustavsson (SWE)
Assistant Referee 2: Fredrik Klyver (SWE)
Fourth Official: Glenn Nyberg (SWE)
Referee Observer: Alexei Spirin (RUS)
NK Osijek – FC Luzern
Referee: Marco Guida (ITA)
Assistant Referee 1: Matteo Passeri (ITA)
Assistant Referee 2: Ciro Carbone (ITA)
Fourth Official: Fabio Maresca (ITA)
Referee Observer: Fritz Stuchlik (AUT)
Aberdeen FC – Široki Brijeg
Referee: Erik Lambrechts (BEL)
Assistant Referee 1: Karel De Rocker (BEL)
Assistant Referee 2: Jo De Weirdt (BEL)
Fourth Official: Frederik Geldhof (BEL)
Referee Observer: Edgar Steinborn (GER)
Cork City – AEK Larnaca
Referee: François Letexier (FRA)
Assistant Referee 1: Cyril Mugnier (FRA)
Assistant Referee 2: Philippe Jeanne (FRA)
Fourth Official: Karim Abed (FRA)
Referee Observer: Robert Malek (POL)
Željezničar – AIK
Referee: Adrien Jaccottet (SUI)
Assistant Referee 1: Vital Jobin (SUI)
Assistant Referee 2: Jan Köbeli (SUI)
Fourth Official: Lionel Tschudi (SUI)
Referee Observer: Are Habicht (ISR)
Ferencvárosi – Midtjylland
Referee: Sandro Schärer (SUI)
Assistant Referee 1: Sladan Josipovic (SUI)
Assistant Referee 2: Bekim Zogaj (SUI)
Fourth Official: Fedayi San (SUI)
Referee Observer: Igor Satki (MDA)
Panionios – Gorica
Referee: Hugo Ferreira (POR)
Assistant Referee 1: Antonio Godinho (POR)
Assistant Referee 2: Nuno Conceição (POR)
Fourth Official: Fábio Veríssimo (POR)
Referee Observer: Sokol Jareci (ALB)
Shamrock Rovers – Mladá Boleslav
Referee: Bojan Pandzic (SWE)
Assistant Referee 1: Joakim Nilsson (SWE)
Assistant Referee 2: Mikael Hallin (SWE)
Fourth Official: Johan Hamlin (SWE)
Referee Observer: Andrejs Sipailo (LVA)
Valur Reykjavík – NK Domžale
Referee: Tore Hansen (NOR)
Assistant Referee 1: Jon-Michael Knutsen (NOR)
Assistant Referee 2: Oystein Ytterland (NOR)
Fourth Official: Espen Eskås (NOR)
Referee Observer: John Ward (IRL)