It's here! Real Madrid and Barcelona lock horns in the first of four El Clasico encounters in 16 days as the great rivals meet in their La Liga clash at the Santiago Bernabeu.

Following is a selection of five key games between Real and Barca, known as the "clasicos", going back more than a century...

BARCELONA: Valdes, Alves, Pique, Puyol, Adriano, Busquets, Xavi, Iniesta, Villa, Pedro, Messi. Subs: Banquillo: Pinto, Keita, Maxwell, Thiago, Fontas, Milito, Afellay.

Real Madrid coach Jose Mourinho's decision not to speak to the media ahead of the 'Clasico' with Barcelona resulted in a walk-out by scores of journalists at the start of the pre-match press conference, which was held by assistant coach Aitor Karanka.

We have run through a series of the key head-to-head battles which await us in this evening's Clasico, from Messi v Ronaldo, to Villa v Benzema...

The Real Madrid team is already in at the Bernabeu! The Barcelona side is yet to be announced...

REAL MADRID: Casillas, Ramos, Carvalho, Albiol, Marcelo, Xabi Alonso, Khedira, Pepe, Di Maria, Ronaldo, Benzema. Subs: Dudek, Arbeloa, Garay, Kaka, Adebayor, Higuain, Ozil

We've got a veritable feast of features, pre-match hype, rumour and speculation to throw your way before kick off at 21:00 UK time, so strap in and brace yourselves for this evening's epic match...