26 September 2017
Girondins de Bordeaux – RB Salzburg
Referee: Luís Godinho (POR, photo)
Assistant Referee 1: Rui Teixeira (POR)
Assistant Referee 2: Nélson Cordeiro (POR)
Fourth Official: Cédric Dos Santos (FRA)
Referee Observer: Marcel Vanelsocht (BEL)
Dinamo – Lokomotiva Zagreb
Referee: Giorgi Kruashvili (GEO)
Assistant Referee 1: Davit Chigogidze (GEO)
Assistant Referee 2: Levan Todria (GEO)
Fourth Official: Horia Mladinovici (ROU)
Referee Observer: Nicolae Grigorescu (ROU)
Zimbru Chișinău – KS Vllaznia
Referee: Zaven Hovhannisyan (ARM)
Assistant Referee 1: Erik Arevshatyan (ARM)
Assistant Referee 2: Artur Gdlyan (ARM)
Fourth Official: Ion Orlic (MDA)
Referee Observer: Igor Șațkii (MDA)
Hammarby – Ajax
Referee: Alex Troleis (FAR)
Assistant Referee 1: Andrew Christiansen (FAR)
Assistant Referee 2: Jan Andersen (FAR)
Fourth Official: Patrik Eriksson (SWE)
Referee Observer: Martin Ingvarsson (SWE)
27 September 2017
KäPa – Esbjerg
Referee: Mohammed Al-Hakim (SWE)
Assistant Referee 1: Daniel Gustavsson (SWE)
Assistant Referee 2: Peter Magnusson (SWE)
Fourth Official: Jani Laaksonen (FIN)
Referee Observer: Petteri Kari (FIN)
Inter Milano – Dynamo Kyiv
Referee: Nenad Djokić (SRB)
Assistant Referee 1: Miloš Simović (SRB)
Assistant Referee 2: Marko Djuričić (SRB)
Fourth Official: Daniele Chiffi (ITA)
Referee Observer: Stefano Podeschi (SMR)
Kairat Almaty – FC Krasnodar
Referee: Halil Meler (TUR)
Assistant Referee 1: Mehmet Tuğral (TUR)
Assistant Referee 2: Deniz Özaral (TUR)
Fourth Official: Daniyar Sakhi (KAZ)
Referee Observer: Pavel Saliy (KAZ)
Ludogorets Razgrad – FK Željezničar
Referee: Alexandru Tean (MDA)
Assistant Referee 1: Dumitru Ciobanu (MDA)
Assistant Referee 2: Anatolie Basiul (MDA)
Fourth Official: Dragomir Draganov (BUL)
Referee Observer: Kostadin Gerginov (BUL)
Bursaspor – Saburtalo
Referee: Furkat Atazhanov (KAZ)
Assistant Referee 1: Samat Tergeussizov (KAZ)
Assistant Referee 2: Sergey Kalachyov (KAZ)
Fourth Official: Zorbay Küçük (TUR)
Referee Observer: Sabri Çelik (TUR)
Dudelange – Sparta Praha
Referee: Luís Teixeira (AND)
Assistant Referee 1: Bruno Fernandes (AND)
Assistant Referee 2: Alexis Terrazo (AND)
Fourth Official: Ricardo Fernandes (LUX)
Referee Observer: Luc Wilmes (LUX)
FK Brodarac – Maccabi Haifa
Referee: Pavel Orel (CZE)
Assistant Referee 1: Petr Blažej (CZE)
Assistant Referee 2: Jiří Kříž (CZE)
Fourth Official: Andrija Stojanović (SRB)
Referee Observer: Boško Jovanetić (SRB)
Breiðablik – Legia Warszawa
Referee: Manfredas Lukjančukas (LTU)
Assistant Referee 1: Vytis Snarskis (LTU)
Assistant Referee 2: Mantas Lešinskas (LTU)
Fourth Official: Egill Gudlaugsson (ISL)
Referee Observer: Pjetur Sigurdsson (ISL)