Welcome to our LIVE coverage of Barcelona's clash against Atletico Madrid.

The referee mercifully blows up a minute early, and another Barcelona masterclass is complete!

GOAL!! Messi gets his hat-trick! Lovely one-two with Villa and Messi fires through Courtois's legs to register his 12th career treble for Barca! What. A. Player.

Messi has now scored 13 goals in 11 league games against Atletico more than any other club.

Xavi runs on to Alves cross and volleys it into the ground and over the bar!

Valdes is off his line quickly to deby Adrian and Gabi's effort on the rebound from distance flies wide!

Barcelona substitution: Maxwell replaces Abidal.

That truly was sensational. Atletico have done well this half, but another goal felt inevitable and it was always likely to be Messi.

GOAL!! It's another sublime effort from Lionel Messi! The World Player of the Year drifts to the left as he surges past two Atletico defenders and hits a low effort across Courtois into the the far bottom corner!

Beautiful skill from Thiago as he rolls the ball under his foot and knocks it through Lopez's legs!

Guardiola has clearly had enough of the rain. He has donned a Barca training top now after spedning the first half in a rain soaked suit jacket.

Messi will take the free-kick. He bends it around the outside of the wall but it goes a foot wide of Courtois's near post. The keeper looked to have had that covered.

Barcelona substitution: Seydou Keita replaces Fabregas.

Barca break via a mesmerising run from Messi and Perea brings him down on the edge of the area.

Diego lfoats in a delivery and Valdes punches it well clear with Falcao lurking.

Pique gets booked for lunging into a challenge on Falcao and getting all of the man but none of the ball. Diego may fancy shooting from here...

Courtois, on loan from Chelsea, has given a very good account of himself despite conceding three goals this evening.

Messi turns to face goal from the right wing, sees Villa's run and plays a pass along the deck that takes out every defender! Villa meets it and tries to sweep a finish past Courtois, but the young Belgian keeper is equal to it!

Xavi elects to play this one short and give Barca possession.

Messi is played in down the left channel and Perea slide sin to make a vital block. Another corner to Barca. Atletico are yet to win one.

Turan is no slouch, but his attempt to turn past alves wide on the right is easily thwarted by the Brazilian.