Sheriff Tiraspol – Viktoria Plzen
Referee: Danny Makkelie (NED, photo)
Assistant Referee 1: Hessel Steegstra (NED)
Assistant Referee 2: Jan de Vries (NED)
Fourth Official: Jeroen Manschot (NED)
VAR: Pol van Boekel (NED)
AVAR: Clay Ruperti (NED)
Referee Observer: Elmir Pilav (BIH)
PFK Ludogorets – GNK Dinamo
Referee: Cüneyt Çakir (TUR)
Assistant Referee 1: Kerem Ersoy (TUR)
Assistant Referee 2: Alpaslan Dedeş (TUR)
Fourth Official: Yaşar Uğurlu (TUR)
VAR: Abdulkadir Bitigen (TUR)
AVAR: Mert Güzenge (TUR)
Referee Observer: Marian Ružbarsky (SVK)
AS Monaco – PSV Eindhoven
Referee: Davide Massa (ITA)
Assistant Referee 1: Filippo Meli (ITA)
Assistant Referee 2: Mauro Vivenzi (ITA)
Fourth Official: Davide Ghersini (ITA)
VAR: Marco Guida (ITA)
AVAR: Ciro Carbone (ITA)
Referee Observer: Volodymyr Petrov (UKR)
Union Saint Gilloise – Rangers FC
Referee: Irfan Peljto (BIH)
Assistant Referee 1: Davor Beljo (BIH)
Assistant Referee 2: Senad Ibrišimbegović (BIH)
Fourth Official: Miloš Gigović (BIH)
VAR: Marco Fritz (GER)
AVAR: Markus Sinn (GER)
Referee Observer: Vitor Melo Pereira (POR)
SL Benfica – FC Midtjylland
Referee: Alejandro Hernandez Hernandez (ESP)
Assistant Referee 1: Jose Naranjo Perez (ESP)
Assistant Referee 2: Diego Sanchez Rojo (ESP)
Fourth Official: Jose Munuera Montero (ESP)
VAR: Ricardo de Burgos Bengoetxea (ESP)
AVAR: Cesar Soto Grado (ESP)
Referee Observer: Markus Nobs (SUI)
Bodo Glimt – Zalgiris Vilnius
Referee: Istvan Vad (HUN)
Assistant Referee 1: Vencel Toth (HUN)
Assistant Referee 2: Istvan Albert (HUN)
Fourth Official: Sandor Ando-Szabo (HUN)
VAR: Bastian Dankert (GER)
AVAR: Mark Borsch (GER)
Referee Observer: Ichko Lozev (BUL)
Maccabi Haifa – Apollon Limassol
Referee: Maurizio Mariani (ITA)
Assistant Referee 1: Daniele Bindoni (ITA)
Assistant Referee 2: Alessandro Lo Cicero (ITA)
Fourth Official: Matteo Marchetti (ITA)
VAR: Massimiliano Irrati (ITA)
AVAR: Matteo Passeri (ITA)
Referee Observer: Tomasz Mikulski (POL)
Qarabag FK – Ferencvarosi TC
Referee: Andreas Ekberg (SWE)
Assistant Referee 1: Mehmet Culum (SWE)
Assistant Referee 2: Niklas Nyberg (SWE)
Fourth Official: Adam Ladebäck (SWE)
VAR: Jochem Kamphuis (NED)
AVAR: Rob Dieperink (NED)
Referee Observer: Miroslav Tulinger (CZE)
Dynamo Kyiv – Sturm Graz
Referee: François Letexier (FRA)
Assistant Referee 1: Cyril Mugnier (FRA)
Assistant Referee 2: Mehdi Rahmouni (FRA)
Fourth Official: Jeremy Stinat (FRA)
VAR: Pierre Gaillouste (FRA)
AVAR: Eric Wattellier (FRA)
Referee Observer: Alberto Undiano Mallenco (ESP)
Crvena Zvezda – Pyunik FA
Referee: Artur Soares Dias (POR)
Assistant Referee 1: Rui Tavares (POR)
Assistant Referee 2: Paulo Soares (POR)
Fourth Official: Fabio Verissimo (POR)
VAR: Tiago Martins (POR)
AVAR: Hugo Miguel (POR)
Referee Observer: Edgar Steinborn (GER)