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Barcelona players may make up a significant portion of the final squad and the starting lineup, but their are many quality players on the side who are underrated at the international level.
Sergio Ramos will continue to command the right-back position, but if anything were to happen to either Carles Puyol or Gerard Pique, the likely starters, Ramos is more than capable of doing the job in the middle.
On the attacking side of things, both David Silva and Juan Mata have been major parts of their respective sides in England, but have played second fiddle for the majority of the past two tournaments. That could change this summer, and it won't be a bad thing.
Fernando Llorente may become the most important piece for Spain when the championship rolls around. With Fernando Torres still far from his best and David Villa possible to miss through injury, Fernando Llorente may find himself in the starting spot.
He has the power to be alone up front and also the technical qualities to fit in with the teams passing style. Llorente is a great finisher and could prove to be very important.