Gerard Pique and Thomas Vermaelen (Centre-backs)

They looked a bit shaky in the first half but their performance proved to be absolutely perfect in the second half. They frustrated Real Madrid by blocking many crosses and crucial passes in the final third. One notable occasion was when Pique's tackle saved Ronaldo getting one on one with Ter-Stegen.
Sergio Busquets (Central defensive-midfielder)

He is the backbone of this Barcelona team. Always seemed calm when on the ball and released the ball at the right moment to the right man. As mentioned by the commentator, "50% of the credit for the first goal goes to Busquets", and rightly so. He kept the possession under pressure deep in his own half and then realised a brilliant ball to Rakitic who passed to Sergi Roberto which was finally finished off by Luis Suarez.