Based on form, Barcelona are heavy favourites to defeat Real Madrid tomorrow in a Clasico match of vital importance in the La Liga title race.

But form is temporary and class is permanent as the old saying goes. Fortunately, class is something both sides have in abundance.

"The way I feel it now around the city, is that the pressure is on Barcelona because in the first Clasico they were next to inept. They started in a way that made it look like they had the measure of Real Madrid. By the end of that Clasico in October, it could have been 5-1 or 6-1 to Real Madrid," said our European football correspondent Graham Hunter on Off The Ball. 

"There's a sense as well of Barcelona needing to win this game handsomely for them to regard themselves as champions-elect and for people to say that this is a Barcelona side that isn't just beginning to look impressive again and just capable of quite interesting peaks." 

Graham also explained why the Champions League quarter-final draw to face Atletico Madrid could have a positive impact on Carlo Ancelotti and his squad: