Referee appointments for the second legs of 2021/22 UEFA Europa League play-offs, to be played on 26 August 2021.
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| Ivan Kružliak in charge of HJK Helsinki - Fenerbahçe SK, observed by Uno Turk (EST) |
17:00 CET - Yerevan (Republican Stadium after Vazgen Sargsyan)
Alashkert FC (ARM) - Rangers FC (SCO)
Referee: Tobias Stieler (GER)
Assistant Referee 1: Christian Gittelmann (GER)
Assistant Referee 2: Eduard Beitinger (GER)
Fourth Official: Harm Osmers (GER)
UEFA Referee Observer: Vladimir Antonov (MDA)
UEFA Delegate: Irakli Nakaidze (GEO)
HJK Helsinki (FIN) - Fenerbahçe SK (TUR)
Referee: Ivan Kruzliak (SVK)
Assistant Referee 1: Branislav Hancko (SVK)
Assistant Referee 2: Jan Pozor (SVK)
Fourth Official: Peter Kralovic (SVK)
UEFA Referee Observer: Uno Tutk (EST)
UEFA Delegate: Vignir Þormóðsson (ISL)
FC Zorya Luhansk (UKR) - SK Rapid Wien (AUT)
Referee: István Kovács (ROU)
Assistant Referee 1: Vasile Florin Marinescu (ROU)
Assistant Referee 2: Mihai Ovidiu Artene (ROU)
Fourth Official: Lucian Rusandu (ROU)
UEFA Referee Observer: Edward Foley (IRL)
UEFA Delegate: Jasmin Baković (BIH)
Galatasaray S.K. (TUR) Randers FC (DEN)
Referee: Aleksei Kulbakov (BLR)
Assistant Referee 1: Dzmitry Zhuk (BLR)
Assistant Referee 2: Aleh Maslianka (BLR)
Fourth Official: Dzmitry Dzmitryieu (BLR)
UEFA Referee Observer: Jouni Hyytiä (FIN)
UEFA Delegate: Olzhas Abrayev (KAZ)
AZ Alkmaar (NED) - Celtic FC (SCO)
Referee: Tiago Bruno Lopes Martins (POR)
Assistant Referee 1: Luis André Ferreira Pinto Campos (POR)
Assistant Referee 2: Rui Miguel Martins Teixeira (POR)
Fourth Official: André Filipe Domingues Narciso (POR)
UEFA Referee Observer: Francesco Bianchi (SUI)
UEFA Delegate: Georgios Fantaros (CYP)
CFR 1907 Cluj (ROU) - FK Crvena zvezda (SRB)
Referee: Michael Oliver (ENG)
Assistant Referee 1: Stuart Burt (ENG)
Assistant Referee 2: Simon Peter Bennett (ENG)
Fourth Official: Darren England (ENG)
UEFA Referee Observer: Jan W. Wegereef (NED)
UEFA Delegate: Olivier Chovaux (FRA)
ŠK Slovan Bratislava (SVK) - Olympiacos FC (GRE)
Referee: Deniz Aytekin (GER)
Assistant Referee 1: Christian Dietz (GER)
Assistant Referee 2: Dominik Schaal (GER)
Fourth Official: Martin Petersen (GER)
UEFA Referee Observer: Raymond Ellingham (WAL)
UEFA Delegate: Tarik Shamel (ENG)
Legia Warszawa (POL) - SK Slavia Praha (CZE)
Referee: Artur Manuel Ribeiro Soares Dias (POR)
Assistant Referee 1: Rui Licinio Barbosa Tavares (POR)
Assistant Referee 2: Pedro Ricardo Ferreira Ribeiro (POR)
Fourth Official: Miguel Hugo Filipe Ferreira C. Moreira (POR)
UEFA Referee Observer: Iain Robertson Brines (SCO)
UEFA Delegate: Octavian Goga (ROU)
Royal Antwerp FC (BEL) - Omonoia FC (CYP)
Referee: Andris Treimanis (LVA)
Assistant Referee 1: Haralds Gudermanis (LVA)
Assistant Referee 2: Aleksejs Spasjonnikovs (LVA)
Fourth Official: Aleksandrs Golubevs (LVA)
UEFA Referee Observer: Stefan Messner (AUT)
UEFA Delegate: Iva Olivari-Uliša (CRO)
SK Sturm Graz (AUT) - NS Mura (SVN)
Referee: José María Sánchez Martínez (ESP)
Assistant Referee 1: Raúl Cabañero Martínez (ESP)
Assistant Referee 2: Iñigo Prieto López de Ceraín (ESP)
Fourth Official: José Luis Munuera Montero (ESP)
UEFA Referee Observer: Emil Bozhinovski (MKD)
UEFA Delegate: Mohamed Taa (FRA)
