Referee: Milorad Mazic (SRB, photo)
Assistant Referee 1: Milovan Ristic (SRB)
Assistant Referee 2: Igor Radojcic (SRB)
Additional AR 1: Bosko Jovanetic (SRB)
Additional AR 2: Vlado Glodjovic (SRB)
Fourth Official: Milenko Vukadinovic (SRB)
Braga – Besiktas
Referee: Kevin Blom (NED)
Assistant Referee 1: Sander van Roekel (NED)
Assistant Referee 2: Berry Simons (NED)
Additional AR 1: Reinold Wiedemeijer (NED)
Additional AR 2: Ed Janssen (NED)
Fourth Official: Tom van Sichem (NED)
16 February 2012
Lokomotiv Moskow – Athletic Bilbao
Referee: Ovidiu Hategan (ROU)
Assistant Referee 1: Zoltan Szekely (ROU)
Assistant Referee 2: Octavian Sovre (ROU)
Additional AR 1: Alexandru Tudor (ROU)
Additional AR 2: Cristian Balaj (ROU)
Fourth Official: Sebastian Coltescu (ROU)
RB Salzburg – Metalist Harkov
Referee: Marijo Strahonja (CRO)
Assistant Referee 1: Sinisa Premuzaj (CRO)
Assistant Referee 2: Igor Krmar (CRO)
Additional AR 1: Igor Pristovnik (CRO)
Additional AR 2: Damir Batinic (CRO)
Fourth Official: Ante Vucemilovic-Simunovic (CRO)
Ajax Amsterdam – Manchester United
Referee: Gianluca Rocchi (ITA)
Assistant Referee 1: Andrea Stefani (ITA)
Assistant Referee 2: Gianluca Cariolato (ITA)
Additional AR 1: Christian Brighi (ITA)
Additional AR 2: Gabriele Gava (ITA)
Fourth Official: Andrea Gervasoni (ITA)
Viktoria Plzen – Schalke
Referee: Stephane Lannoy (FRA)
Assistant Referee 1: Eric Dansault (FRA)
Assistant Referee 2: Frederic Cano (FRA)
Additional AR 1: Fredy Fautrel (FRA)
Additional AR 2: Ruddy Buquet (FRA)
Fourth Official: Antony Gautier (FRA)
Lazio Roma – Atletico Madrid
Referee: Pavel Kralovec (CZE)
Assistant Referee 1: Martin Wilczek (CZE)
Assistant Referee 2: Antonin Kordula (CZE)
Additional AR 1: Miroslav Zelinka (CZE)
Additional AR 2: Radek Prihoda (CZE)
Fourth Official: Libor Kovarik (CZE)
AZ Alkmaar – Anderlecht
Referee: Florian Meyer (GER)
Assistant Referee 1: Jan-Hendrik Salver (GER)
Assistant Referee 2: Mark Borsch (GER)
Additional AR 1: Deniz Aytekin (GER)
Additional AR 2: Tobias Welz (GER)
Fourth Official: Peter Sippel (GER)
Legia – Sporting
Referee: Matej Jug (SVN)
Assistant Referee 1: Marko Stancin (SVN)
Assistant Referee 2: Matej Zunic (SVN)
Additional AR 1: Dragoslav Peric (SVN)
Additional AR 2: Davor Drecnik (SVN)
Fourth Official: Darko Ceferin (SVN)
Udinese – PAOK
Referee: Alberto Undiano Mallenco (ESP)
Assistant Referee 1: Raul Cabanero Martinez (ESP)
Assistant Referee 2: Fermin Martinez Ibanez (ESP)
Additional AR 1: Carlos Clos Gomez (ESP)
Additional AR 2: Javier Estrada Fernandez (ESP)
Fourth Official: Jose Paradas Romero (ESP)
FC Porto – Manchester City
Referee: Cuneyt Cakir (TUR)
Assistant Referee 1: Bahattin Duran (TUR)
Assistant Referee 2: Emre Eyisoy (TUR)
Additional AR 1: Huseyin Gocek (TUR)
Additional AR 2: Bulent Yildirim (TUR)
Fourth Official: Suleyman Abay (TUR)
Steaua Bucuresti – FC Twente
Referee: Mark Clattenburg (ENG)
Assistant Referee 1: Darren Cann (ENG)
Assistant Referee 2: Jake Collin (ENG)
Additional AR 1: Lee Mason (ENG)
Additional AR 2: Michael Jones (ENG)
Fourth Official: Michael Oliver (ENG)
SC Hannover – FC Brugge
Referee: Manuel De Sousa (POR)
Assistant Referee 1: Jose Tiago Trigo (POR)
Assistant Referee 2: Ricardo Santos (POR)
Additional AR 1: Duarte Gomes (POR)
Additional AR 2: Vasco Santos (POR)
Fourth Official: Artur Soares Dias (POR)
Wisla Krakow – Standard Liege
Referee: David Fernandez Borbalan (ESP)
Assistant Referee 1: Juan Carlos Yuste Jimenez (ESP)
Assistant Referee 2: Jesus Calvo Guadamuro (ESP)
Additional AR 1: Fernando Teixeira Vitienes (ESP)
Additional AR 2: Cesar Muniz Fernandez (ESP)
Fourth Official: Javier Turienzo Alvarez (ESP)
Trabzonspor – PSV Eindhoven
Referee: Felix Brych (GER)
Assistant Referee 1: Mike Pickel (GER)
Assistant Referee 2: Stefan Lupp (GER)
Additional AR 1: Christian Dingert (GER)
Additional AR 2: Markus Wingenbach (GER)
Fourth Official: Guido Winkmann (GER)
Stoke City – Valencia CF
Referee: Peter Rasmussen (DEN)
Assistant Referee 1: Henrik Sonderby (DEN)
Assistant Referee 2: Niels Hog (DEN)
Additional AR 1: Jakob Kehlet (DEN)
Additional AR 2: Lars Christoffersen (DEN)
Fourth Official: Michael Tykgaard (DEN)