UEFA Champions League – Play-off (First Leg)

20 August 2013
Viktoria Plzen – NK Maribor
Referee: Olegario Benquerenca (POR, photo)
Assistant Referee 1: Ricardo Santos (POR)
Assistant Referee 2: Joao Santos (POR)
Additional AR1: Artur Soares (POR)
Additional AR2: Carlos Taborda (POR)
Fourth Official: Nuno Pereira (POR)
Referee Observer: Siegfried Kirschen (GER)

Shakhter Karagandy – Celtic Glasgow
Referee: Pavel Kralovec (CZE)
Assistant Referee 1: Martin Wilczek (CZE)
Assistant Referee 2: Antonin Kordula (CZE)
Additional AR 1: Radek Prihoda (CZE)
Additional AR2: Michal Patak (CZE)
Fourth Official: Patrik Filipek (CZE)
Referee Observer: Sergey Zuev (RUS)

Olympique Lyon – Real Sociedad
Referee: Milorad Mazic (SRB)
Assistant Referee 1: Milovan Ristic (SRB)
Assistant Referee 2: Dalibor Djurdjevic (SRB)
Additional AR1: Danilo Grujic (SRB)
Additional AR2: Miodrag Gogic (SRB)
Fourth Official: Milan Minic (SRB)
Referee Observer: Konrad Plautz (AUT)

PSV Eindhoven – AC Milan
Referee: Cuneyt Cakir (TUR)
Assistant Referee 1: Bahattin Duran (TUR)
Assistant Referee 2: Tarik Ongun (TUR)
Additional AR1: Huseyin Gocek (TUR)
Additional AR2: Mete Kalkavan (TUR)
Fourth Official: Mustafa Eyisoy (TUR)
Referee Observer: Nikolai Levnikov (RUS)

Pacos Ferreira – Zenit St. Petersburg
Referee: Martin Atkinson (ENG)
Assistant Referee 1: Peter Kirkup (ENG)
Assistant Referee 2: Simon Long (ENG)
Additional AR1: Anthony Taylor (ENG)
Additional AR2: Michael Jones (ENG)
Fourth Official: Stephen Child (ENG)
Referee Observer: Georgios Bikas (GRE)

Steaua Bucuresti – Legia Warszawa
Referee: Nicola Rizzoli (ITA)
Assistant Referee 1: Andrea Stefani (ITA)
Assistant Referee 2: Renato Faverani (ITA)
Additional AR1: Antonio Damato (ITA)
Additional AR2: Domenico Celi (ITA)
Fourth Official: Riccardo Di Fiore (ITA)
Referee Observer: Patrick Kelly (IRL)

21 August 2013
Schalke – PAOK Salonic
Referee: Stephane Lannoy (FRA)
Assistant Referee 1: Frederic Cano (FRA)
Assistant Referee 2: Cyril Gringore (FRA)
Additional AR1: Fredy Fautrel (FRA)
Additional AR2: Ruddy Buquet (FRA)
Fourth Official: Frederic Haquette (FRA)
Referee Observer: Gudmunder Jonsson (ISL)

Fenerbahce – Arsenal
Referee: Gianluca Rocchi (ITA)
Assistant Referee 1: Elenito Di Liberatore (ITA)
Assistant Referee 2: Gianluca Cariolato (ITA)
Additional AR1: Mauro Bergonzi (ITA)
Additional AR2: Andrea Gervasoni (ITA)
Fourth Official: Alessandro Giallatini (ITA)
Referee Observer: Zoran Petrovic (SRB)

Dinamo Zagreb – Austria Wien
Referee: Howard Webb (ENG)
Assistant Referee 1: Michael Mullarkey (ENG)
Assistant Referee 2: Darren Cann (ENG)
Additional AR1: Lee Probert (ENG)
Additional AR2: Lee Mason (ENG)
Fourth Official: Simon Bennett (ENG)
Referee Observer: Ilkka Koho (FIN)

Ludogorets – FC Basel
Referee: Wolfgang Stark (GER)
Assistant Referee 1: Jan-Hendrik Salver (GER)
Assistant Referee 2: Mike Pickel (GER)
Additional AR1: Tobias Welz (GER)
Additional AR2: Tobias Stieler (GER)
Fourth Official: Detlef Scheppe (GER)
Referee Observer: Miroslav Vitkovic (CRO)