20 February 2018
Bayern München – Beşiktaş
Referee: Ovidiu Hațegan (ROU, photo)
Assistant Referee 1: Octavian Șovre (ROU)
Assistant Referee 2: Sebastian Gheorghe (ROU)
Additional AR 1: István Kovács (ROU)
Additional AR 2: Sebastian Colţescu (ROU)
Fourth Official: Radu Ghinguleac (ROU)
Referee Observer: Matteo Trefoloni (ITA)
Chelsea – FC Barcelona
Referee: Cüneyt Çakır (TUR)
Assistant Referee 1: Bahattin Duran (TUR)
Assistant Referee 2: Tarik Ongun (TUR)
Additional AR 1: Hüseyin Göçek (TUR)
Additional AR 2: Barış Şimşek (TUR)
Fourth Official: Mustafa Eyisoy (TUR)
Referee Observer: Sándor Piller (HUN)
21 February 2018
Shakhtar Donetsk – AS Roma
Referee: William Collum (SCO)
Assistant Referee 1: David McGeachie (SCO)
Assistant Referee 2: Francis Connor (SCO)
Additional AR 1: Robert Madden (SCO)
Additional AR 2: John Beaton (SCO)
Fourth Official: Douglas Potter (SCO)
Referee Observer: Itchko Lozev (BUL)
Sevilla FC – Manchester United
Referee: Clément Turpin (FRA)
Assistant Referee 1: Nicolas Danos (FRA)
Assistant Referee 2: Cyril Gringore (FRA)
Additional AR 1: Ruddy Buquet (FRA)
Additional AR 2: Nicolas Rainville (FRA)
Fourth Official: Hicham Zakrani (FRA)
Referee Observer: Eugen Strigel (GER)