It's got nothing to do with defenders being on top.
The game had few moments of excitement from a neutral point of view. Hardly any shots on goal, lots of disruptions enhanced by bad acting (which a proper referee would have simply ignored). Spain didn't even get to play their dreaded tiki taka thanks to Portugal. Still, that didn't really help. This year, I feel there is no purpose in Spain's game, I never get the feeling they are out to score. I guess they think they will score one goal eventually and that's that.
I wish in case Spain faces Germany, that the young squad of enthusiastic German players take them apart. Would be nice to see.