Real Madrid's Ricardo Carvalho (L) reacts to a yellow card shown by referee Frank de Bleeckere, next to teammmate Xabi Alonso during their Champions League semi-final second leg soccer match against Barcelona at Nou Camp stadium in Barcelona May 3, 2011. REUTERS/Albert Gea (SPAIN - Tags: SPORT SOCCER)
Barcelona's coach Pep Guardiola gestures during their Champions League semi-final second leg soccer match against Real Madrid at Nou Camp stadium in Barcelona, May 3, 2011. REUTERS/Albert Gea (SPAIN - Tags: SPORT SOCCER)
Real Madrid's Xabi Alonso (L) reacts to referee Frank de Bleeckere of Belgium after a foul during their Champions League semi-final second leg soccer match against Barcelona at Nou Camp stadium in Barcelona, May 3, 2011. REUTERS/Albert Gea (SPAIN - Tags: SPORT SOCCER)