These ratings are given to players based on their performance during the 2014-15 season and range from A+ (the best) to F (the worst). They are given based on how well they performed the role they were given, so they are not absolute but relative to expectation.
Gerard Pique
Pique proved, once again, that he is one of the best defenders, if not the absolute best, in the world. His dominance in the air helped Barcelona turn a weakness into a strength, and once again he was elegant on the ball. He even made some timely sliding tackles and blocks.