UEFA Europa League – Quarter-finals (First Leg)

3 April 2014

FC Porto – Sevilla CF
Referee: Wolfgang Stark (GER, photo)
Assistant Referee 1: Jan-Hendrik Salver (GER)
Assistant Referee 2: Mike Pickel (GER)
Additional AR 1: Marco Fritz (GER)
Additional AR 2: Robert Hartmann (GER)
Fourth Official: Christoph Bornhorst (GER)
Referee Observer: Michel Vautrot (FRA)

FC Basel – Valencia CF
Referee: Martin Atkinson (ENG)
Assistant Referee 1: Stephen Child (ENG)
Assistant Referee 2: Darren England (ENG)
Additional AR 1: Anthony Taylor (ENG)
Additional AR 2: Craig Pawson (ENG)
Fourth Official: Jake Collin (ENG)
Referee Observer: Stefan Ormandjiev (BUL)

AZ Alkmaar – Benfica SL
Referee: Svein Oddvar Moen (NOR)
Assistant Referee 1: Kim Haglund (NOR)
Assistant Referee 2: Frank Andas (NOR)
Additional AR 1: Ken Henry Johnsen (NOR)
Additional AR 2: Svein-Erik Edvartsen (NOR)
Fourth Official: Sven Erik Midthjell (NOR)
Referee Observer: Nikolai Levnikov (RUS)

Olympique Lyon – Juventus Turin
Referee: William Collum (SCO)
Assistant Referee 1: Martin Cryans (SCO)
Assistant Referee 2: William Conquer (SCO)
Additional AR 1: Robert Madden (SCO)
Additional AR 2: John Beaton (SCO)
Fourth Official: Gavin Harris (SCO)
Referee Observer: Zdravko Jokić (SRB)