UEFA Europa League – Quarter-finals (First Leg)

13 April 2017

Ajax – Schalke
Referee: Sergei Karasev (RUS, photo)
Assistant Referee 1: Anton Averianov (RUS)
Assistant Referee 2: Tikhon Kalugin (RUS)
Additional AR 1: Sergei Lapochkin (RUS)
Additional AR 2: Sergei Ivanov (RUS)
Fourth Official: Igor Demeshko (RUS)
Referee Observer: Bo Karlsson (SWE)

Olympique Lyonnais – Beşiktaş
Referee: Antonio Mateu Lahoz (ESP)
Assistant Referee 1: Pau Cebrián Devís (ESP)
Assistant Referee 2: Javier Aguilar Rodríguez (ESP)
Additional AR 1: Jesús Gil Manzano (ESP)
Additional AR 2: Carlos Clos Gómez (ESP)
Fourth Official: Teodoro Sobrino Magán (ESP)
Referee Observer: Francesco Bianchi (SUI)

Celta Vigo – KRC Genk
Referee: Clement Turpin (FRA)
Assistant Referee 1: Nicolas Danos (FRA)
Assistant Referee 2: Cyril Gringore (FRA)
Additional AR 1: Benoît Bastien (FRA)
Additional AR 2: Nicolas Rainville (FRA)
Fourth Official: Hicham Zakrani (FRA)
Referee Observer: Christos Skapoullis (CYP)

Anderlecht – Manchester United

Referee: Felix Brych (GER)
Assistant Referee 1: Mark Borsch (GER)
Assistant Referee 2: Stefan Lupp (GER)
Additional AR 1: Marco Fritz (GER)
Additional AR 2: Bastian Dankert (GER)
Fourth Official: Rafael Foltyn (GER)
Referee Observer: Alfredo Trentalange (ITA)