Wednesday, 22 February 2012, 18:00, Etihad Stadium, Manchester, England Manchester City - FC Porto
Referee: Wolfgang Stark (GER)
Assistant Referee 1: Jan-Hendrik Salver (GER)
Assistant Referee 2: Mike Pickel (GER)
4th Official: Marco Fritz (GER)
Additional Assistant Referee 1: Florian Meyer (GER)
Additional Assistant Referee 2: Deniz Aytekin (GER)
UEFA Delegate: Jean-Francois Crucke (BEL)
UEFA Referee Observer: Zoran Petrovic (SRB)
Blog Referee Observer: Niclas E. (GER)
Thursday, 23 February 2012, 19:00, Mestalla, Spain Valencia - Stoke City
Referee: Markus Strömbergsson (SWE)
Assistant Referee 1: Stefan Wittberg (SWE)
Assistant Referee 2: Mathias Klasenius (SWE)
4th Official: Johan Hamlin (SWE)
Additional Assistant Referee 1: Martin Hansson (SWE)
Additional Assistant Referee 2: Tobias Mattsson (SWE)
UEFA Delegate: Rudolf Repka (CZE)
UEFA Referee Observer: Christakis Skapoullis (CYP)
Blog Referee Observer: Pascal J. (SUI)
Thursday, 23 February 2012, 19:00, San Mamés, Bilbao, Spain Athletic - Lokomotiv Moskva
Referee: Pawel Gil (POL)
Assistant Referee 1: Piotr Sadczuk (POL)
Assistant Referee 2: Marcin Borkowski (POL)
4th Official: Robert Malek (POL)
Additional Assistant Referee 1: Hubert Siejewicz (POL)
Additional Assistant Referee 2: Szymon Marciniak (POL)
UEFA Delegate: Nodar Akhalkatsi (GEO)
UEFA Referee Observer: Alan Snoddy (NIR)
Blog Referee Observer:
Thursday, 23 February 2012, 19:00, Twente Stadion, Enschede, Netherlands Twente - Steaua Bucuresti
Referee: Robert Schörgenhofer (AUT)
Assistant Referee 1: Alain Hoxha (AUT)
Assistant Referee 2: Armin Eder (AUT)
4th Official: Alexander Harkam (AUT)
Additional Assistant Referee 1: Rene Eisner (AUT)
Additional Assistant Referee 2: Thomas Gangl (AUT)
UEFA Delegate: Antoine Portelli (MLT)
UEFA Referee Observer: Stefano Farina (ITA)
Blog Referee Observer:
Thursday, 23 February 2012, 19:00, Stadio Toumba, Saloniki, Greece PAOK - Udinese 
Referee: Tom Harald Hagen (NOR)
Assistant Referee 1: Kim Thomas Haglund (NOR)
Assistant Referee 2: Frank Andas (NOR)
4th Official: Dag Vidar Hafsas (NOR)
Additional Assistant Referee 1: Tommy Skjerven (NOR)
Additional Assistant Referee 2: Espen Berntsen (NOR)
UEFA Delegate: Balázs Makray (HUN)
UEFA Referee Observer: Manuel Diaz Vega (ESP)
Blog Referee Observer: Edward A. (GRE)
Thursday, 23 February 2012, 19:00, PSV Stadion, Eindhoven, Netherlands PSV - Trabzonspor 
Referee: Tony Chapron (FRA)
Assistant Referee 1: Eric Dansault (FRA)
Assistant Referee 2: Fredji Harchay (FRA)
4th Official: Alexendre Castro (FRA)
Additional Assistant Referee 1: Clément Turpin (FRA)
Additional Assistant Referee 2: Said Ennjimi (FRA)
UEFA Delegate: Benny Jacobsen (DEN)
UEFA Referee Observer: Vítor Melo Pereira (POR)
Blog Referee Observer: Cagatay I. (TUR)
Thursday, 23 February 2012, 19:00, Jan Breydelstadion, Brugge, Belgium Club Brugge - Hannover 96 
Referee: William Collum (SCO)
Assistant Referee 1: Derek Rose (SCO)
Assistant Referee 2: Graham Chambers (SCO)
4th Official: Crawford Allan (SCO)
Additional Assistant Referee 1: Alan Muir (SCO)
Additional Assistant Referee 2: Robert Madden (SCO)
UEFA Delegate: Pat Quigley (IRL)
UEFA Referee Observer: Marc Batta (FRA)
Blog Referee Observer: Niclas E. (GER)
Thursday, 23 February 2012, 19:00, Stade Maurice Dufrasne, Liège, Belgium Standard Liège - Wisla Kraków 
Referee: Milorad Mazic (SRB)
Assistant Referee 1: Milovan Ristic (SRB)
Assistant Referee 2: Igor Radojcic (SRB)
4th Official: Vlado Glodjovic (SRB)
Additional Assistant Referee 1: Milenko Vukadinovic (SRB)
Additional Assistant Referee 2: Bosko Jovanetic (SRB)
UEFA Delegate: Milovan Djukanovic (MNE)
UEFA Referee Observer: Sándor Piller (HUN)
Blog Referee Observer:
Thursday, 23 February 2012, 21:05, Inönü, Istanbul, Turkey Besiktas - Braga 
Referee: István Vad (HUN)
Assistant Referee 1: Gabor Eros (HUN)
Assistant Referee 2: Robert Kispál (HUN)
4th Official: Sandor Andó-Szabó (HUN)
Additional Assistant Referee 1: Mihaly Fabián (HUN)
Additional Assistant Referee 2: Tamás Bognar (HUN)
UEFA Delegate: Patrick Wattebled (FRA)
UEFA Referee Observer: Pierluigi Collina (ITA)
Blog Referee Observer: Filipe T. (POR)
Thursday, 23 February 2012, 21:05, Old Trafford, Manchester, England Manchester United - Ajax Amsterdam 
Referee: Damir Skomina (SVN)
Assistant Referee 1: Primoz Arhar (SVN)
Assistant Referee 2: Matej Zunic (SVN)
4th Official: Roberto Ponis (SVN)
Additional Assistant Referee 1: Matej Jug (SVN)
Additional Assistant Referee 2: Slavko Vincic (SVN)
UEFA Delegate: Tryvge Bornö (NOR)
UEFA Referee Observer: Leif Sundell (SWE)
Blog Referee Observer: Mohammed A.Fattah (EGY)
Thursday, 23 February 2012, 21:05, José Alvalade, Lisbon, Portugal Sporting - Legia 
Referee: Vladislav Bezborodov (RUS)
Assistant Referee 1: Nikolay Golubev (RUS)
Assistant Referee 2: Vyacheslav Semenov (RUS)
4th Official: Stanislav Sukhina (RUS)
Additional Assistant Referee 1: Vladimir Kazhmenko (RUS)
Additional Assistant Referee 2: Vitaly Meshkov (RUS)
UEFA Delegate: Dag Steinar Vestlund (NOR)
UEFA Referee Observer: Luis Medina Cantalejo (ESP)
Blog Referee Observer: Qudamah N. (POL)
Thursday, 23 February 2012, 21:05, VeltinsArena, Gelsenkirchen, Germany Schalke 04 - Viktoria Plzen Referee: Alan Kelly (IRL)
Assistant Referee 1: Damien Macgraith (IRL)
Assistant Referee 2: Marc Douglas (IRL)
4th Official: Neil Doyle (IRL)
Additional Assistant Referee 1: Padraigh Sutton (IRL)
Additional Assistant Referee 2: Tomas Connolly (IRL)
UEFA Delegate: Christian Kofoed (DEN)
UEFA Referee Observer: William Young (SCO)
Blog Referee Observer: Niclas E. (GER)
Thursday, 23 February 2012, 21:05, Metalist Stadium, Kharkiv, Ukraine Metalist - Salzburg 
Referee: Antony Gautier (FRA)
Assistant Referee 1: Michael Annonier (FRA)
Assistant Referee 2: Frédéric Cano (FRA)
4th Official: Hervé Piccirillo (FRA)
Additional Assistant Referee 1: Fredy Fautrel (FRA)
Additional Assistant Referee 2: Ruddy Buquet (FRA)
UEFA Delegate: Ivan Lekov (BUL)
UEFA Referee Observer: Uno Tutk (EST)
Blog Referee Observer:
Thursday, 23 February 2012, 21:05, Georgios Karaiskakis Stadium, Piraeus, Greece Olympiacos - Rubin Kazan 
Referee: Stefan Johannesson (SWE)
Assistant Referee 1: Fredrik Nilsson (SWE)
Assistant Referee 2: Magnus Sjöblom (SWE)
4th Official: Daniel Stalhammar (SWE)
Additional Assistant Referee 1: Michael Lerjeus (SWE)
Additional Assistant Referee 2: Martin Strömbergsson (SWE)
UEFA Delegate: Yoav Strauss (ISR)
UEFA Referee Observer: Costas Kapitanis (CYP)
Blog Referee Observer:
Thursday, 23 February 2012, 21:05, Constant Vanden Stock, Brussels, Belgium Anderlecht - AZ Alkmaar 
Referee: Pedro Proenca (POR)
Assistant Referee 1: Bertino Miranda (POR)
Assistant Referee 2: Ricardo Santos (POR)
4th Official: Hugo Miguel (POR)
Additional Assistant Referee 1: Manuel de Sousa (POR)
Additional Assistant Referee 2: Duarte Gomes (POR)
UEFA Delegate: Andrian Ixari (MDA)
UEFA Referee Observer: Stephen Bennett (ENG)
Blog Referee Observer: Philipp S. (GER)
Thursday, 23 February 2012, 21:05, Estádio Vicente Calderón, Madrid, Spain Atlético Madrid - Lazio Roma 
Referee: Martin Atkinson (ENG)
Assistant Referee 1: Peter Kirkup (ENG)
Assistant Referee 2: Stephen Child (ENG)
4th Official: Andre Marriner (ENG)
Additional Assistant Referee 1: Mark Clattenburg (ENG)
Additional Assistant Referee 2: Michael Oliver (ENG)
UEFA Delegate: Ainar Leppänen (EST)
UEFA Referee Observer: Francesco Bianchi (SUI)
Blog Referee Observer: Chefren (ITA)