El Clasico: Barcelona vs Real Madrid - Combined XI

Right midfielder: Luka Modric

World Cup exertions have taken its toll on Modric

Touted to win this year's Ballon d'Or and break the Messi-Ronaldo duopoly, Modric has not been the same player since the World Cup concluded. Fatigue maybe a factor, but the Croat is struggling to assert his influence on the game.

He is out of pace and easily beaten to the ball in the midfield. Modric has an assist to show for his efforts, but that can't mask the cracks that have developed in his armor.

Central midfielder: Sergio Busquets

Busquets has kept the juices flowing

Often referred to as Barcelona's heartbeat, Busquets continues to run the show from the midfield. And in the recent Champions League game to Inter Milan, produced an insane skill that had the fans waxing lyrical about him.

His eye for pass and ability to win back possession are as impressive as ever, and his influence from the centre of the park can help orchestrate Barcelona's way to a victory on Sunday.

Left-midfielder: Philippe Coutinho

Coutinho is fast growing into Barcelona's new talisman

The Brazilian sensation has dovetailed to the demands of Spanish football without breaking a sweat. And barely nine months into his Barcelona career, already seems to have become a leading figure on Valverde's teamsheet.

He's netted four and assisted three in just nine starts in all competitions this season, and with Messi on the sidelines for a considerable time, can make an even bigger impact during this spell.