23 August 2016
AS Roma – FC Porto
Referee: Szymon Marciniak (POL, photo)
Assistant Referee 1: Pawel Sokolnicki (POL)
Assistant Referee 2: Tomasz Listkiewicz (POL)
Additional AR 1: Pawel Raczkowski (POL)
Additional AR 2: Tomasz Musial (POL)
Fourth Official Radoslaw Siejka (POL)
Referee Observer: Christakis Skapoullis (CYP)
Hapoel Beer Sheva – Celtic FC
Referee: Bas Nijhuis (NED)
Assistant Referee 1: Rob van de Ven (NED)
Assistant Referee 2: Charles Schaap (NED)
Additional AR 1: Serdar Gözübüyük (NED)
Additional AR 2: Dennis Higler (NED)
Fourth Official: Patrick Langkamp (NED)
Referee Observer: Alexandru Deaconu (ROU)
Viktoria Plzeň – Ludogorets Razgrad
Referee: Alberto Undiano Mallenco (ESP)
Assistant Referee 1: Juan Yuste Jiménez (ESP)
Assistant Referee 2: Diego Barbero Sevilla (ESP)
Additional AR 1: Carlos Clós Gomez (ESP)
Additional AR 2: Javier Estrada Fernández (ESP)
Fourth Official: Miguel Martínez Munuera (ESP)
Referee Observer: Rune Pedersen (NOR)
AS Monaco – Villarreal
Referee: Jonas Eriksson (SWE)
Assistant Referee 1: Mathias Klasenius (SWE)
Assistant Referee 2: Daniel Wärnmark (SWE)
Additional AR 1: Martin Strömbergsson (SWE)
Additional AR 2: Markus Strömbergsson (SWE)
Fourth Official: Mehmet Culum (SWE)
Referee Observer: Georgios Bikas (GRE)
Legia Warszawa – Dundalk FC
Referee: Svein Oddvar Moen (NOR)
Assistant Referee 1: Kim Haglund (NOR)
Assistant Referee 2: Frank Andas (NOR)
Additional AR 1: Svein-Erik Edvartsen (NOR)
Additional AR 2: Tore Hansen (NOR)
Fourth Official: Jan Erik Engan (NOR)
Referee Observer: Alain Hamer (LUX)
24 August 2016
Apoel Nicosia – FC Kobenhavn
Referee: Gianluca Rocchi (ITA)
Assistant Referee 1: Gianluca Cariolato (ITA)
Assistant Referee 2: Filippo Meli (ITA)
Additional AR 1: Davide Massa (ITA)
Additional AR 2: Daniele Doveri (ITA)
Fourth Official: Riccardo Di Fiore (ITA)
Referee Observer: Manuel Díaz Vega (ESP)
Rostov – Ajax
Referee: Milorad Mažić (SRB)
Assistant Referee 1: Milovan Ristić (SRB)
Assistant Referee 2: Dalibor Djurdjević (SRB)
Additional AR 1: Danilo Grujić (SRB)
Additional AR 2: Nenad Djokić (SRB)
Fourth Official: Uroš Stojković (SRB)
Referee Observer: Jozef Marko (SVK)
Manchester City – Steaua Bucureşti
Referee: Pawel Gil (POL)
Assistant Referee 1: Piotr Sadczuk (POL)
Assistant Referee 2: Marcin Borkowski (POL)
Additional AR 1: Bartosz Frankowski (POL)
Additional AR 2: Krzysztof Jakubik (POL)
Fourth Official: Konrad Sapela (POL)
Referee Observer: Horst Brummeier (AUT)
FC Salzburg – Dinamo Zagreb
Referee: Craig Thomson (SCO)
Assistant Referee 1: David McGeachie (SCO)
Assistant Referee 2: Alan Mulvanny (SCO)
Additional AR 1: Kevin Clancy (SCO)
Additional AR 2: Andrew Dallas (SCO)
Fourth Official: Stuart Stevenson (SCO)
Referee Observer: Oguz Sarvan (TUR)
Borussia Mönchengladbach – Young Boys
Referee: Andre Marriner (ENG)
Assistant Referee 1: Simon Beck (ENG)
Assistant Referee 2: Stuart Burt (ENG)
Additional AR 1: Craig Pawson (ENG)
Additional AR 2: Robert Madley (ENG)
Fourth Official: Harry Lennard (ENG)
Referee Observer: Jorn West Larsen (DEN)