5 March 2019Real Madrid – AFC Ajax
Referee: Felix Brych (GER, photo)
Assistant Referee 1: Mark Borsch (GER)
Assistant Referee 2: Stefan Lupp (GER)
Fourth Official: Daniel Siebert (GER)
VAR: Bastian Dankert (GER)
AVAR: Marco Fritz (GER)
Referee Observer: Emil Božinovski (MKD)
Borussia Dortmund – Tottenham Hotspur
Referee: Danny Makkelie (NED)
Assistant Referee 1: Mario Diks (NED)
Assistant Referee 2: Hessel Steegstra (NED)
Fourth Official: Kevin Blom (NED)
VAR: Pol van Boekel (NED)
AVAR: Jochem Kamphuis (NED)
Referee Observer: Marc Batta (FRA)
6 March 2019
FC Porto – AS Roma
Referee: Cüneyt Çakır (TUR)
Assistant Referee 1: Bahattin Duran (TUR)
Assistant Referee 2: Tarık Ongun (TUR)
Fourth Official: Halis Özkahya (TUR)
VAR: Szymon Marciniak (POL)
AVAR: Paweł Gil (POL)
Referee Observer: Bertrand Layec (FRA)
Paris Saint Germain – Manchester United
Referee: Damir Skomina (SVN)
Assistant Referee 1: Jure Praprotnik (SVN)
Assistant Referee 2: Robert Vukan (SVN)
Fourth Official: Matej Jug (SVN)
VAR: Massimiliano Irrati (ITA)
AVAR: Marco Guida (ITA)
Referee Observer: Luciano Luci (ITA)