2-3 April 2019
FC Barcelona – Olympique Lyonnais
Referee: Dennis Higler (NED, photo)
Assistant Referee 1: Johan Balder (NED)
Assistant Referee 2: Joost van Zuilen (NED)
Fourth Official: Rubén Ávalos Barrera (ESP)
Referee Observer: Lucílio Batista (POR)
FC Porto – FC Midtjylland
Referee: Andrew Dallas (SCO)
Assistant Referee 1: David Doig (SCO)
Assistant Referee 2: Paul O'Neill (SCO)
Fourth Official: David Oliveira (POR)
Referee Observer: Manuel Mejuto González (ESP)
Chelsea FC – GNK Dinamo
Referee: Radu Petrescu (ROU)
Assistant Referee 1: Radu Ghinguleac (ROU)
Assistant Referee 2: Mircea Grigoriu (ROU)
Fourth Official: John Busby (ENG)
Referee Observer: Stephen Lodge (ENG)
TSG Hoffenheim – Real Madrid
Referee: Nikola Dabanović (MNE)
Assistant Referee 1: Vladan Todorović (MNE)
Assistant Referee 2: Srdjan Jovanović (MNE)
Fourth Official: Patrick Alt (GER)
Referee Observer: Edgar Steinborn (GER)