Jose Mourinho accused Barcelona of being favoured by the footballing authorities and questioned their successes after 10-man Real Madrid fell 2-0 in their Champions League semi-final first leg on Wednesday.
Real had midfielder Pepe sent off after 62 minutes and Mourinho was sent to the stands for his protests soon after, and Lionel Messi took full advantage to score both goals in a stunned Bernabeu.
"Congratulations to a fantastic football team," Mourinho said in a rambling rant at the post-match news conference.
"But congratulations for all they have as well, it must be difficult to get to get all this power. Where does this power come from?
Mourinho went on to list Barca's semi-final victory over Chelsea in 2009, the Inter Milan semi-final from last season and now "the scandal of the Bernabeu", as he suggested unfair red cards had been issued to rivals playing the Catalan side.
"This thing happens in each semi-final," he said. "I am here just to ask this question and I hope to get the answer one day.
"I respect him (Barca coach Pep Guardiola) a great deal as a coach and a person...but I would like to see him win a Champions League without scandals."