UEL Quarter-finals, First Leg

7 April 2011

FC Porto – Spartak Moscow
Referee: Serge Gumienny (BEL, photo)
Assistant Referee 1: Mark Simons (BEL)
Assistant Referee 2: Frank Bleyen (BEL)
Additional Assistant Referee 1: Jean-Baptist Bultynck (BEL)
Additional Assistant Referee 2: Peter Vervecken (BEL)
Fourth Official: Luc Wouters (BEL)

Benfica – PSV
Referee: Paolo Tagliavento (ITA)
Assistant Referee 1: Nicola Nicoletti (ITA)
Assistant Referee 2: Massimiliano Grilli (ITA)
Additional Assistant Referee 1: Mauro Bergonzi (ITA)
Additional Assistant Referee 2: Andrea De Marco (ITA)
Fourth Official: Luca Banti (ITA)

Villarreal – Twente
Referee: Aleksei Nikolaev (RUS)
Assistant Referee 1: Nikolai Golubev (RUS)
Assistant Referee 2: Anton Averianov (RUS)
Additional Assistant Referee 1: Vladimir Pettay (RUS)
Additional Assistant Referee 2: Maksim Layushkin (RUS)
Fourth Official: Vladislav Bezborodov (RUS)

Dynamo Kyiv – Braga
Referee: Björn Kuipers (NED)
Assistant Referee 1: Sander van Roekel (NED)
Assistant Referee 2: Berry Simons (NED)
Additional Assistant Referee 1: Richard Liesveld (NED)
Additional Assistant Referee 2: Ed Janssen (NED)
Fourth Official: Pol van Boekel (NED)