Alashkert – Rangers
Referee: Tobias Stieler (GER, photo)
Assistant Referee 1: Christian Gittelmann (GER)
Assistant Referee 2: Eduard Beitinger (GER)
Fourth Official: Harm Osmers (GER)
Referee Observer: Vladimir Antonov (MDA)
HJK Helsinki – Fenerbahce SK
Referee: Ivan Kruzliak (SVK)
Assistant Referee 1: Branislav Hancko (SVK)
Assistant Referee 2: Jan Pozor (SVK)
Fourth Official: Peter Kralovic (SVK)
Referee Observer: Uno Tutk (EST)
Zorya Luhansk – Rapid Wien
Referee: Istvan Kovacs (ROU)
Assistant Referee 1: Vasile Marinescu (ROU)
Assistant Referee 2: Ovidiu Artene (ROU)
Fourth Official: Lucian Rusandu (ROU)
Referee Observer: Edward Foley (IRL)
Galatasaray – Randers
Referee: Aleksei Kulbakov (BLR)
Assistant Referee 1: Dzmitry Zhuk (BLR)
Assistant Referee 2: Aleh Maslianka (BLR)
Fourth Official: Dzmitry Dzmitryieu (BLR)
Referee Observer: Jouni Hyytia (FIN)
AZ Alkmaar – Celtic FC
Referee: Tiago Martins (POR)
Assistant Referee 1: Luis Campos (POR)
Assistant Referee 2: Rui Teixeira (POR)
Fourth Official: Andre Narciso (POR)
Referee Observer: Francesco Bianchi (SUI)
CFR Cluj – Crvena Zvezda
Referee: Michael Oliver (ENG)
Assistant Referee 1: Stuart Burt (ENG)
Assistant Referee 2: Simon Bennett (ENG)
Fourth Official: Darren England (ENG)
Referee Observer: Jan Wegereef (NED)
Slovan Bratislava – Olympiacos FC
Referee: Deniz Aytekin (GER)
Assistant Referee 1: Christian Dietz (GER)
Assistant Referee 2: Dominik Schaal (GER)
Fourth Official: Martin Petersen (GER)
Referee Observer: Raymond Ellingham (WAL)
Legia Warszawa – Slavia Praha
Referee: Artur Soares Dias (POR)
Assistant Referee 1: Rui Tavares (POR)
Assistant Referee 2: Pedro Ribeiro (POR)
Fourth Official: Miguel Moreira (POR)
Referee Observer: Iain Robertson Brines (SCO)
Royal Antwerp – Omonia FC
Referee: Andris Treimanis (LVA)
Assistant Referee 1: Haralds Gudermanis (LVA)
Assistant Referee 2: Aleksejs Spasjonnikovs (LVA)
Fourth Official: Aleksandrs Golubevs (LVA)
Referee Observer: Stefan Messner (AUT)
Sturm Graz – NS Mura
Referee: Jose Sanchez Martinez (ESP)
Assistant Referee 1: Raul Cabanero Martinez (ESP)
Assistant Referee 2: Inigo Prieto Lopez (ESP)
Fourth Official: Jose Munuera Montero (ESP)
Referee Observer: Emil Bozhinovski (MKD)
