11-12 July 2017FK Partizan – Budućnost Podgorica
Referee: Pol van Boekel (NED, photo)
Assistant Referee 1: Rob van de Ven (NED)
Assistant Referee 2: Jan Vries (NED)
Fourth Official: Christian Bax (NED)
Referee Observer: Nikolai Ivanov (RUS)
Qarabağ Ağdam – FC Samtredia
Referee: Mete Kalkavan (TUR)
Assistant Referee 1: Esat Sancaktar (TUR)
Assistant Referee 2: Erdem Bayik (TUR)
Fourth Official: Halil Umut Meler (TUR)
Referee Observer: Vladimir Antonov (MDA)
Hibernians – FC Salzburg
Referee: Fran Jović (CRO)
Assistant Referee 1: Ivica Modrić (CRO)
Assistant Referee 2: Hrvoje Radić (CRO
Fourth Official: Igor Pajac (CRO)
Referee Observer: Manuel Díaz Vega (ESP)
HNK Rijeka – The New Saints
Referee: Kristo Tohver (EST)
Assistant Referee 1: Hannes Reinvald (EST)
Assistant Referee 2: Neeme Neemlaid (EST)
Fourth Official: Juri Frischer (EST)
Referee Observer: Peter Fröjdfeldt (SWE)
Spartaks Jurmala – FC Astana
Referee: Neil Doyle (IRL)
Assistant Referee 1: Robert Clarke (IRL)
Assistant Referee 2: Dermot Broughton (IRL)
Fourth Official: Robert Hennessy (IRL)
Referee Observer: Frank De Bleeckere (BEL)
Zrinjski Mostar – NK Maribor
Referee: Daniel Siebert (GER)
Assistant Referee 1: Jan Seidel (GER)
Assistant Referee 2: Lasse Koslowski (GER)
Fourth Official: Harm Osmers (GER)
Referee Observer: Bertrand Layec (FRA)
Malmö FF – Vardar
Referee: Thorvaldur Arnason (ISL)
Assistant Referee 1: Johann Gudmundsson (ISL)
Assistant Referee 2: Gylfi Sigurdsson (ISL)
Fourth Official: Gunnar Jónsson (ISL)
Referee Observer: Rodger Gifford (WAL)
Hapoel Beer Sheva – Budapest Honvéd
Referee: Andreas Ekberg (SWE)
Assistant Referee 1: Mehmet Culum (SWE)
Assistant Referee 2: Stefan Hallberg (SWE)
Fourth Official: Kristoffer Karlsson (SWE)
Referee Observer: Miroslav Tulinger (CZE)
Sheriff – Kukësi
Referee: Christos Nicolaides (CYP)
Assistant Referee 1: Charalambos Charalambous (CYP)
Assistant Referee 2: Ioannis Lazarou (CYP)
Fourth Official: Vasilis Dimitriou (CYP)
Referee Observer: Gerard Perry (IRL)
Apoel – Dudelange
Referee: Alan Sant (MLT)
Assistant Referee 1: Roberto Vella (MLT)
Assistant Referee 2: Luke Portelli (MLT)
Fourth Official: Mario Apap (MLT)
Referee Observer: Jan Fasung (SVK)
Bate Borisov – Alashkert FC
Referee: Enea Jorgji (ALB)
Assistant Referee 1: Ermal Barushi (ALB)
Assistant Referee 2: Ridiger Çokaj (ALB)
Fourth Official: Kridens Meta (ALB)
Referee Observer: Terje Hauge (NOR)
IFK Mariehamn – Legia Warszawa
Referee: Andrew Dallas (SCO)
Assistant Referee 1: Douglas Potter (SCO)
Assistant Referee 2: Sean Carr (SCO)
Fourth Official: Nicolas Walsh (SCO)
Referee Observer: Jørn West Larsen (DEN)
Žalgiris Vilnius – PFC Ludogorets
Referee: Manuel Schüttengruber (AUT)
Assistant Referee 1: Roland Brandner (AUT)
Assistant Referee 2: Stefan Kühr (AUT)
Fourth Official: Sebastian Gishamer (AUT)
Referee Observer: Boško Jovanetić (SRB)
MŠK Žilina – FC København
Referee: Benoit Millot (FRA)
Assistant Referee 1: Julien Pacelli (FRA)
Assistant Referee 2: Stephan Luzi (FRA)
Fourth Official: Jérôme Brisard (FRA)
Referee Observer: Leslie Irvine (NIR)
Dundalk FC – Rosenborg BK
Referee: Radu Petrescu (ROU)
Assistant Referee 1: Radu Ghinguleac (ROU)
Assistant Referee 2: Mircea Grigoriu (ROU)
Fourth Official: Marcel Birsan (ROU)
Referee Observer: Hans Reijgwart (NED)
Hafnarfjördar – Víkingur Gøta
Referee: Petr Ardeleanu (CZE)
Assistant Referee 1: Jiří Moláček (CZE)
Assistant Referee 2: Tomáš Mokrusch (CZE)
Fourth Official: Jan Machálek (CZE)
Referee Observer: Jouni Hyytiä (FIN)
Linfield – Celtic
Referee: Alejandro Hernández Hernández (ESP)
Assistant Referee 1: Teodoro Sobrino Magán (ESP)
Assistant Referee 2: José Naranjo Pérez (ESP)
Fourth Official: Ricardo De Burgos Bengoetxea (ESP)
Referee Observer: Konrad Plautz (AUT)