Royal Antwerp – Tottenham Hotspur
Referee: Maurizio Mariani (ITA, photo)
Assistant Referee 1: Fabiano Preti (ITA)
Assistant Referee 2: Daniele Bindoni (ITA)
Fourth Official: Federico La Penna (ITA)
Referee Observer: Darko Čeferin (SVN)
AC Milan – Sparta Praha
Referee: Halis Özkahya (TUR)
Assistant Referee 1: Kerem Ersoy (TUR)
Assistant Referee 2: Çem Satman (TUR)
Fourth Official: Alper Ulusoy (TUR)
Referee Observer: Domagoj Vuckov (CRO)
LOSC Lille – Celtic FC
Referee: Aleksandar Stavrev (MKD)
Assistant Referee 1: Dejan Kostadinov (MKD)
Assistant Referee 2: Thorsten Schiffner (GER)
Fourth Official: Dimitar Meckarovski (MKD)
Referee Observer: Jens Larsen (DEN)
AEK Athens – Leicester City
Referee: Harald Lechner (AUT)
Assistant Referee 1: Andreas Heidenreich (AUT)
Assistant Referee 2: Maximilian Kolbitsch (AUT)
Fourth Official: Julian Weinberger (AUT)
Referee Observer: Marian Ružbarsky (SVK)
Zorya Luhansk – SC Braga
Referee: Giorgi Kruashvili (GEO)
Assistant Referee 1: Levan Varamishvili (GEO)
Assistant Referee 2: Zaza Pipia (GEO)
Fourth Official: Georgi Vadachkoria (GEO)
Referee Observer: Ray Ellingham (WAL)
Sivasspor – Maccabi Tel Aviv
Referee: Irfan Peljto (BIH)
Assistant Referee 1: Amer Macić (BIH)
Assistant Referee 2: Davor Beljo (BIH)
Fourth Official: Admir Šehović (BIH)
Referee Observer: Kenneth Clark (SCO)
Qarabag FK – Villarreal CF
Referee: Pavel Orel (CZE)
Assistant Referee 1: Petr Blažej (CZE)
Assistant Referee 2: Jiri Križ (CZE)
Fourth Official: Ondrej Pechanec (CZE)
Referee Observer: Levan Paniashvili (GEO)
LASK – PFC Ludogorets
Referee: Javier Estrada Fernandez (ESP)
Assistant Referee 1: Roberto Alonso Fernandez (ESP)
Assistant Referee 2: Guadalupe Porras Ayuso (ESP)
Fourth Official: Jose Munuera Montero (ESP)
Referee Observer: Goran Mihaljević (MNE)
Feyenoord – Wolfsberger AC
Referee: Srdjan Jovanović (SRB)
Assistant Referee 1: Uroš Stojković (SRB)
Assistant Referee 2: Milan Mihajlović (SRB)
Fourth Official: Viktor Kopiievskyi (UKR)
Referee Observer: Iain Robertson Brines (SCO) CSKA Moskva – GNK Dinamo
Referee: Radu Petrescu (ROU)
Assistant Referee 1: Radu Ghinguleac (ROU)
Assistant Referee 2: Mircea Grigoriu (ROU)
Fourth Official: Marcel Birsan (ROU)
Referee Observer: Ferenc Szekely (HUN)
Crvena Zvezda – Slovan Liberec
Referee: Fabio Verissimo (POR)
Assistant Referee 1: Luis Campos (POR)
Assistant Referee 2: Pedro Martins (POR)
Fourth Official: Antonio Nobre (POR)
Referee Observer: Orhan Erdemir (TUR)
KAA Gent – TSG Hoffenheim
Referee: Sandro Schärer (SUI)
Assistant Referee 1: Stephane De Almeida (SUI)
Assistant Referee 2: Bekim Zogaj (SUI)
Fourth Official: Fedayi San (SUI)
Referee Observer: Stefan Messner (AUT)
AS Roma – CSKA Sofia
Referee: Aleksei Kulbakov (BLR)
Assistant Referee 1: Dmitri Zhuk (BLR)
Assistant Referee 2: Oleg Maslyanko (BLR)
Fourth Official: Denis Scherbakov (BLR)
Referee Observer: Francesco Bianchi (SUI)
CFR Cluj – Young Boys
Referee: Glenn Nyberg (SWE)
Assistant Referee 1: Mahbod Beigi (SWE)
Assistant Referee 2: Andreas Söderqvist (SWE)
Fourth Official: Bojan Pandžić (SWE)
Referee Observer: Nikolai Ivanov (RUS)
Arsenal – Dundalk
Referee: Filip Glova (SVK)
Assistant Referee 1: Peter Bednar (SVK)
Assistant Referee 2: František Ferenc (SVK)
Fourth Official: Michal Ocenaš (SVK)
Referee Observer: Hugh Dallas (SCO)
Molde FK – Rapid Wien
Referee: Petr Ardeleanu (CZE)
Assistant Referee 1: Ivo Nadvornik (CZE)
Assistant Referee 2: Petr Caletka (CZE)
Fourth Official: Karel Hrubes (CZE)
Referee Observer: Alain Hamer (LUX)
OGC Nice – Hapoel Beer Sheva
Referee: Chris Kavanagh (ENG)
Assistant Referee 1: Daniel Cook (ENG)
Assistant Referee 2: Sian Massey-Ellis (ENG)
Fourth Official: Peter Bankes (ENG)
Referee Observer: Vitor Melo Pereira (POR)
Slavia Praha – Bayer Leverkusen
Referee: William Collum (SCO)
Assistant Referee 1: Francis Connor (SCO)
Assistant Referee 2: Douglas Ross (SCO)
Fourth Official: Nicholas Walsh (SCO)
Referee Observer: Jan Carlsen (DEN)
Rangers FC – Lech Poznan
Referee: Kristo Tohver (EST)
Assistant Referee 1: Silver Koiv (EST)
Assistant Referee 2: Aron Härsing (EST)
Fourth Official: Juri Frischer (EST)
Referee Observer: Stephen Lodge (ENG)
SL Benfica – Standard de Liege
Referee: François Letexier (FRA)
Assistant Referee 1: Cyril Mugnier (FRA)
Assistant Referee 2: Mehdi Rahmouni (FRA)
Fourth Official: Jeremie Pignard (FRA)
Referee Observer: Michalis Koukoulakis (GRE)
Omonia FC – PSV Eindhoven
Referee: Donatas Rumšas (LTU)
Assistant Referee 1: Aleksandr Radius (LTU)
Assistant Referee 2: Dovydas Sužiedėlis (LTU)
Fourth Official: Donatas Šimenas (LTU)
Referee Observer: Juan Fernandez Marin (ESP)
Granada CF – PAOK FC
Referee: Tiago Martins (POR)
Assistant Referee 1: Pedro Almeida (POR)
Assistant Referee 2: Hugo Ribeiro (POR)
Fourth Official: Helder Malheiro (POR)
Referee Observer: Thomas Einwaller (AUT)
AZ Alkmaar – HNK Rijeka
Referee: Sergei Ivanov (RUS)
Assistant Referee 1: Roman Usachev (RUS)
Assistant Referee 2: Valeri Danchenko (RUS)
Fourth Official: Sergei Lapochkin (RUS)
Referee Observer: Augustus Constantin (ROU)
Real Sociedad – SSC Napoli
Referee: Craig Pawson (ENG)
Assistant Referee 1: Ian Hussin (ENG)
Assistant Referee 2: Constantine Hatzidakis (ENG)
Fourth Official: Andrew Madley (ENG)
Referee Observer: Pascal Garibian (FRA)