Real Madrid really deserved the victory, because they didn't allowed Barcelona to score a single goal from the match to prove to people that the injuries some of their players had some months ago that affected some of their potential players not to performed well that gave Barcelona to defeated them 2-1 in the first leg. Real Madrid were able to used all their potential players to played the second leg to defeated Barcelona 4-0 which is a sign that Real Madrid may have something reasonable to achieve in this tournament. Barcelona performance was very poor in this second leg which their coach need to apply some skills that will improve their performance in their remaining matches.
It seems that everyone was surprised by Real Madrid's performance which was able to beat Barcelona in the semi-final second leg of the Copa del Rey. even Barcelona could not reply to a single goal in that match. I don't know what went wrong with Barcelona in this game. but Barcelona's Defense was not what it used to be. they have several gaps that can be exploited by Real Madrid players to create good opportunities. and Benzema also appeared extraordinary in this match. Benzema managed to make a hat trick in this match. and it really exceeded everyone's expectations. because Benzema proved that age is no longer young is not a barrier for him.