Real Madrid welcome Barcelona to the Bernabeu for round three of the late-season Clasico series - the Champions League semi-final, first leg.

There goes the final whistle! And Barca win it 2-0! Madrid are aggrieved and they have it all to do next week back at the Camp Nou!

So, with three Clasicos down in this mini-series, it's all square. Madrid have won one, Barca have won one and there has been one draw.

With the match won, Villa is withdrawn. Sergi Roberto comes on to replace him.

GOAL! Messi again! It's two for Barca! And surely that will be enough now! What a strike! He dances through the Madrid defence before finishing past Casillas! A fine individual goal!

With a lead heading back to the Nou Camp, you'd expect Barca to make it to the final now...

Adebayor now gets booked for a shove to the face of Busquets... he could easily have gone for that. Mourinho watches icily from the stands.

Messi jumps into Albiol and the crowd are baying for blood, but it's just a free-kick.

That's Messi's first goal in Barca's six semi-finals over the past three years.

GOAL! Messi gives Barca the lead! Afellay does really well to get the byline past Marcelo to send over a cross to the near post where Messi applies the finishing touch!

Ronaldo dusts himself off but his free-kick is way over the bar.

Ronaldo and Pique clash... it'll be a Madrid free-kick.

This game really has been a disappointment. It's become a bit of a battle, rather than the free-flowing showcase of football we were hoping for.

Pedro departs, Afellay comes on.

Twenty minutes left for Barca to grab what could be a vital away goal.

You'd expect Barca to start to play some more expansive football now, but remember, Real did well with just 10 men in the Liga match last week.

Ooh! Villa does really well to get off a shot that Casillas saves... but he can only prod it out towards Pedro, who somehow reacts in time to get a head on it! Just wide of the post!

Xavi dinks a ball over the top to Alves, but the full-back is way offside.

Alonso takes a free-kick towards Ronaldo, who rises to meet it with a header! He's stretching though and his effort goes over the bar!

Mourinho was sarcastically applauding the fourth ref. This game has got a real sour undertone to it at the moment.

Alves is stretchered off and it looks like Mourinho has been sent to the stands!