27 August 2013
Austria Wien – Dinamo Zagreb
Referee: Paolo Tagliavento (ITA, photo)
Assistant Referee 1: Mauro Tonolini (ITA)
Assistant Referee 2: Lorenzo Manganelli (ITA)
Additional AR 1: Andrea De Marco (ITA)
Additional AR 2: Carmine Russo (ITA)
Fourth Official: Andrea Padovan (ITA)
Referee Observer: Miroslav Liba (CZE)
FC Basel – Ludogorets
Referee: William Collum (SCO)
Assistant Referee 1: Martin Cryans (SCO)
Assistant Referee 2: William Conquer (SCO)
Additional AR 1: Robert Madden (SCO)
Additional AR 2: John Beaton (SCO)
Fourth Official: Gavis Harris (SCO)
Referee Observer: Leif Sundell (SWE)
Legia Warszawa – Steaua Bucuresti
Referee: Pedro Proenca (POR)
Assistant Referee 1: Tiago Trigo (POR)
Assistant Referee 2: Bertino Miranda (POR)
Additional AR 1: Joao Capela (POR)
Additional AR 2: Hugo Miguel (POR)
Fourth Official: Rui Tavares (POR)
Referee Observer: Murat Ilgaz (TUR)
PAOK – Schalke
Referee: Bjorn Kuipers (NED)
Assistant Referee 1: Sander van Roekel (NED)
Assistant Referee 2: Erwin Zeinstra (NED)
Additional AR 1: Pol van Boekel (NED)
Additional AR 2: Richard Liesveld (NED)
Fourth Official: Davie Goossens (NED)
Referee Observer: Neale Barry (ENG)
Arsenal – Fenerbahce
Referee: Carlos Velasco Carballo (ESP)
Assistant Referee 1: Roberto Alonso Fernandez (ESP)
Assistant Referee 2: Juan Yuste Jimenez (ESP)
Additional AR 1: Carlos Clos Gomez (ESP)
Additional AR 2: Carlos Del Cerro Grande (ESP)
Fourth Official: Javier Aguilar Rodriguez (ESP)
Referee Observer: Adrian Casha (MLT)
28 August 2013
AC Milan – PSV Eindhoven
Referee: Mark Clattenburg (ENG)
Assistant Referee 1: Stephen Child (ENG)
Assistant Referee 2: Simon Beck (ENG)
Additional AR 1: Lee Probert (ENG)
Additional AR 2: Kevin Friend (ENG)
Fourth Official: Darren Cann (ENG)
Referee Observer: Ryszard Wojcik (POL)
Zenit St. Petersburg – Pacos Ferreira
Referee: Alberto Undiano Mallenco (ESP)
Assistant Referee 1: Roberto Diaz Perez (ESP)
Assistant Referee 2: Victoriano Diaz Casado (ESP)
Additional AR 1: Fernando Teixeira Vitienes (ESP)
Additional AR 2: Jesus Gil Manzano (ESP)
Fourth Official: Jose Fernandez Miranda (ESP)
Referee Observer: Drago Kos (SVN)
NK Maribor – Viktoria Plzen
Referee: Felix Brych (GER)
Assistant Referee 1: Mark Borsch (GER)
Assistant Referee 2: Stefan Lupp (GER)
Additional AR 1: Marco Fritz (GER)
Additional AR 2: Guido Winkmann (GER)
Fourth Official: Thorsten Schiffner (GER)
Referee Observer: Sandor Piller (HUN)
Celtic Glasgow – Shakhter Karagandy
Referee: Svein Oddvar Moen (NOR)
Assistant Referee 1: Kim Haglund (NOR)
Assistant Referee 2: Frank Andas (NOR)
Additional AR 1: Ken Henry Johnsen (NOR)
Additional AR 2: Svein-Erik Edvartsen (NOR)
Fourth Official: Sven Erik Midthjell (NOR)
Referee Observer: Manuel Mejuto Gonzalez (ESP)
Real Sociedad – Olympique Lyon
Referee: Damir Skomina (SVN)
Assistant Referee 1: Matej Zunic (SVN)
Assistant Referee 2: Bojan Ul (SVN)
Additional AR 1: Slavko Vincic (SVN)
Additional AR 2: Roberto Ponis (SVN)
Fourth Official: Primoz Arhar (SVN)
Referee Observer: Andreas Schluchter (SUI)