Olegario Benquerenca (POR) had already been appointed for the second leg of the UEFA Champions League, on 12-13 April 2011.
Referee: Olegário Manuel Bartolo Faustino Benquerença Assistant Referee 1: Bertino Cunha Miranda Assistant Referee 2: João Ferreira Santos Additionat Assistant Referee 1: Artur Manuel Ribeiro Soares Dias Additional Assistant Referee 2: Carlos Miguel Taborda Xistra Fourth Official: Duarte Nuno Pereira Gomes