All of the goals are just tap-in, you can swap any player you want it that moment and they can make a score.
The first goal is lucky, the second goal is a mistake from Real Madrid's defenders, the third goal is a mistake from Barcelona's defenders.
It's Arda Guler that play really good in that match, I see he could be the next Ozil since he can give accurate pass.
Agree, but can't agree completely, tap-in also requires good positioning, so basically these players are players who understand how they place their positions. It doesn't matter whether the goal is a tap-in or not, a goal is still a goal and is the objective difference in a match. About Arda Guler, he's indeed a good young player, I see him being able to become Mesut Ozil's successor at Real Madrid, we'll see how he goes in the future, whether he can live up to many people's expectations or not.