18 April 2019SSC Napoli – Arsenal FC
Referee: Ovidiu Hațegan (ROU, photo)
Assistant Referee 1: Octavian Șovre (ROU)
Assistant Referee 2: Sebastian Gheorghe (ROU)
Fourth Official: Radu Ghinguleac (ROU)
Additional AR 1: Radu Petrescu (ROU)
Additional AR 2: Sebastian Colțescu (ROU)
Referee Observer: Markus Nobs (SUI)
Valencia – Villarreal
Referee: William Collum (SCO)
Assistant Referee 1: David McGeachie (SCO)
Assistant Referee 2: Francis Connor (SCO)
Fourth Official: Graeme Stewart (SCO)
Additional AR 1: Robert Madden (SCO)
Additional AR 2: Nicolas Walsh (SCO)
Referee Observer: Vítor Melo Pereira (POR)
Eintracht Frankfurt – SL Benfica
Referee: Daniele Orsato (ITA)
Assistant Referee 1: Lorenzo Manganelli (ITA)
Assistant Referee 2: Alessandro Costanzo (ITA)
Fourth Official: Fabiano Preti (ITA)
Additional AR 1: Marco Di Bello (ITA)
Additional AR 2: Daniele Doveri (ITA)
Referee Observer: Hans Reijgwart (NED)
Chelsea FC – Slavia Praha
Referee: Damir Skomina (SVN)
Assistant Referee 1: Jure Praprotnik (SVN)
Assistant Referee 2: Robert Vukan (SVN)
Fourth Official: Tomaž Klančnik (SVN)
Additional AR 1: Slavko Vinčič (SVN)
Additional AR 2: Matej Jug (SVN)
Referee Observer: Manuel Díaz Vega (ESP)
