German national team sporting director Rudi Völler says Antonio Rüdiger needs to show "class" and respect for others after he appeared to throw ice toward the referee during Real Madrid's Copa del Rey loss to Barcelona.

Barcelona has beaten Real Madrid 3-2 in extra time to claim a record-extending 32nd Copa del Rey title and launch its bid for a treble.

Los Blancos booked their place in today's showpiece final with a stirring 5-4 aggregate comeback win over Real Sociedad, while Barcelona scraped past Atletico Madrid by the exact same overall scoreline.