Real Madrid are staring the end of the Carlo Ancelotti era in the face while Barcelona's season could come crashing down in the space of a week

A win wouldn't mathematically end Real's one-year reign atop La Liga, but it would signal its imminent demise.Then comes this match, and a seven-point lead with only three match days left would signal Barca's return to domestic dominance.

Barcelona and Real Madrid are both set to be without the services of key players for this weekend’s El Clásico.This season’s final edition of Spanish football’s biggest fixture is of course