1-2 August 2017
Ludogorets – Hapoel Beer Sheva
Referee: Serdar Gözübüyük (NED, photo)
Assistant Referee 1: Davie Goossens (NED)
Assistant Referee 2: Joost van Zuilen (NED)
Fourth Official: Dennis Higler (NED)
Referee Observer: Herbert Fandel (GER)
FC Sheriff – Qarabağ Ağdam
Referee: Roi Reinshreiber (ISR)
Assistant Referee 1: Amihay Mozes (ISR)
Assistant Referee 2: Dan Ucenic (ISR)
Fourth Official: Daniel Natan (ISR)
Referee Observer: Paulius Malžinskas (LTU)
CSKA Moskva – AEK Athens
Referee: Benoit Millot (FRA)
Assistant Referee 1: Julien Pacelli (FRA)
Assistant Referee 2: Stephan Luzi (FRA)
Fourth Official: Stéphane Jochem (FRA)
Referee Observer: Costas Kapitanis (CYP)
Apoel – Viitorul
Referee: Aleksei Eskov (RUS)
Assistant Referee 1: Dmitri Mosiakin (RUS)
Assistant Referee 2: Igor Demeshko (RUS)
Fourth Official: Kirill Levnikov (RUS)
Referee Observer: Manuel Mejuto González (ESP)
Bate Borisov – Slavia Praha
Referee: Pol van Boekel (NED)
Assistant Referee 1: Charles Schaap (NED)
Assistant Referee 2: Rob van de Ven (NED)
Fourth Official: Allard Lindhout (NED)
Referee Observer: Gylfi Thor Orrason (ISL)
İstanbul Başakşehir – Club Brugge
Referee: István Kovács (ROU)
Assistant Referee 1: Vasile Marinescu (ROU)
Assistant Referee 2: Mihai Artene (ROU)
Fourth Official: Iulian Călin (ROU)
Referee Observer: Levan Paniashvili (GEO)
FC Kobenhavn – FK Vardar
Referee: John Beaton (SCO)
Assistant Referee 1: Graeme Stewart (SCO)
Assistant Referee 2: Douglas Potter (SCO)
Fourth Official: Robert Madden (SCO)
Referee Observer: Marinus Koopman (NED)
Young Boys – Dynamo Kyiv
Referee: Pawel Gil (POL)
Assistant Referee 1: Konrad Sapela (POL)
Assistant Referee 2: Marcin Borkowski (POL)
Fourth Official: Bartosz Frankowski (POL)
Referee Observer: Carmel Agius (MLT)
Viktoria Plzeň – FC Steaua
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: Patrick Kelly (IRL)
Hafnarfjörður – Maribor
Referee: Peter Kralović (SVK)
Assistant Referee 1: Miroslav Benko (SVK)
Assistant Referee 2: Erik Weiss (SVK)
Fourth Official: Jan Valášek (SVK)
Referee Observer: Zbigniew Przesmycki (POL)
Ajax – Nice
Referee: Andre Marriner (ENG)
Assistant Referee 1: Simon Bennett (ENG)
Assistant Referee 2: Harry Lennard (ENG)
Fourth Official: Lee Probert (ENG)
Referee Observer: Erol Ersoy (TUR)
Olympiacos – Partizan
Referee: Javier Estrada Fernández (ESP)
Assistant Referee 1: Miguel Martínez Munuera (ESP)
Assistant Referee 2: Francisco Martín García (ESP)
Fourth Official: Ignacio Iglesias Villanueva (ESP)
Referee Observer: Jørn West Larsen (DEN)
Rijeka – Salzburg
Referee: Hüseyin Göçek (TUR)
Assistant Referee 1: Mustafa Eyisoy (TUR)
Assistant Referee 2: Kemal Yilmaz (TUR)
Fourth Official: Baris Şimşek (TUR)
Referee Observer: Miroslav Liba (CZE)
Rosenborg – Celtic
Referee: Jonathan Lardot (BEL)
Assistant Referee 1: Frédéric Godelaine (BEL)
Assistant Referee 2: Karel De Rocker (BEL)
Fourth Official: Nathan Verboomen (BEL)
Referee Observer: Manuel López Fernández (ESP)
Legia Warszawa – Astana
Referee: Jakob Kehlet (DEN)
Assistant Referee 1: Henrik Larsen (DEN)
Assistant Referee 2: Heine Sørensen (DEN)
Fourth Official: Jens Maae (DEN)
Referee Observer: Luciano Luci (ITA)