Malmö – Chelsea
Referee: Julian Weinberger (AUT, photo)
Assistant Referee 1: Maximilian Weiss (AUT)
Assistant Referee 2: Luka Katholnig (AUT)
Fourth Official: Adi Aganovic (SWE)
Referee Observer: Markus Strombergsson (SWE)
Atalanta – Manchester United
Referee: Mads-Kristoffer Kristoffersen (DEN)
Assistant Referee 1: Dennis Rasmussen (DEN)
Assistant Referee 2: Rene Risum (DEN)
Fourth Official: Antonio Rapuano (ITA)
Referee Observer: Antonio Damato (ITA)
Wolfsburg – Salzburg
Referee: Espen Eskas (NOR)
Assistant Referee 1: Kim Haglund (NOR)
Assistant Referee 2: Oystein Ytterland (NOR)
Fourth Official: Sven Waschitzki (GER)
Referee Observer: Thomas Einwaller (AUT)
Dynamo Kyiv – FC Barcelona
Referee: Duje Strukan (CRO)
Assistant Referee 1: Marjan Tomas (CRO)
Assistant Referee 2: Alen Jaksic (CRO)
Fourth Official: Klym Zabroda (UKR)
Referee Observer: Volodymyr Petrov (UKR)
Juventus – Zenit
Referee: Enea Jorgji (ALB)
Assistant Referee 1: Dojando Myftari (ALB)
Assistant Referee 2: Xhulio Mani (ALB)
Fourth Official: Simone Sozza (ITA)
Referee Observer: Alfredo Trentalange (ITA)
Bayern – Benfica
Referee: Abdulkadir Bitigen (TUR)
Assistant Referee 1: Abdullah Özkara (TUR)
Assistant Referee 2: Anil Usta (TUR)
Fourth Official: Michael Bacher (GER)
Referee Observer: Peter Sippel (GER)
FC Sevilla – Olympique Lille
Referee: Vitor Ferreira (POR)
Assistant Referee 1: Paulo Bras (POR)
Assistant Referee 2: Luis Costa (POR)
Fourth Official: Manuel Orellana Cid (ESP)
Referee Observer: Juan Fernandez Marin (ESP)
Villarreal – Young Boys
Referee: Andrei Chivulete (ROU)
Assistant Referee 1: Adrian Vornicu (ROU)
Assistant Referee 2: Mihaita Necula (ROU)
Fourth Official: Ivan Munoz Perez (ESP)
Referee Observer: Alberto Undiano Mallenco (ESP)
Sheriff – Inter Milano
Referee: Milos Milanovic (SRB)
Assistant Referee 1: Marko Djuricic (SRB)
Assistant Referee 2: Stefan Vojnic (SRB)
Fourth Official: Ion Orlic (MDA)
Referee Observer: Igor Șațchii (MDA)
Manchester City – Club Brugge
Referee: Krzysztof Jakubik (POL)
Assistant Referee 1: Bartosz Heinig (POL)
Assistant Referee 2: Marek Arys (POL)
Fourth Official: James Bell (ENG)
Referee Observer: Mark Whitby (WAL)
RB Leipzig – Paris St. Germain
Referee: Ioannis Papadopoulos (GRE)
Assistant Referee 1: Konstantinos Nikolaidis (GRE)
Assistant Referee 2: Vassilis Nikolakakis (GRE)
Fourth Official: Lasse Koslowski (GER)
Referee Observer: Helmut Fleischer (GER)
Real Madrid – Shakhtar Donetsk
Referee: Donald Robertson (SCO)
Assistant Referee 1: Andrew Kirkland (SCO)
Assistant Referee 2: David Doig (SCO)
Fourth Official: Alvaro Rodriguez Recio (ESP)
Referee Observer: Bernardino Gonzalez Vazquez (ESP)
AC Milan – FC Porto
Referee: Trustin Farrugia Cann (MLT)
Assistant Referee 1: Luke Portelli (MLT)
Assistant Referee 2: Duncan Spencer (MLT)
Fourth Official: Alessandro Prontera (ITA)
Referee Observer: Drago Kos (SVN)
Borussia Dortmund – AFC Ajax
Referee: Michael Fabbri (ITA)
Assistant Referee 1: Davide Imperiale (ITA)
Assistant Referee 2: Domenico Palermo (ITA)
Fourth Official: Thorben Siewer (GER)
Referee Observer: Edgar Steinborn (GER)
Sporting CP – Besiktas
Referee: Bojan Pandzic (SWE)
Assistant Referee 1: Mikael Hallin (SWE)
Assistant Referee 2: Peter Magnusson (SWE)
Fourth Official: Hugo Silva (POR)
Referee Observer: Nuno Castro (POR)
Liverpool FC – Atletico de Madrid
Referee: Mykola Balakin (UKR)
Assistant Referee 1: Oleksandr Zhukov (UKR)
Assistant Referee 2: Dmytro Zaporozhenko (UKR)
Fourth Official: Benjamin Speedie (ENG)
Referee Observer: Michael Ross (NIR)