Barcelona already look much better. Memphis Depay flicks the ball to Philippe Coutinho, whose shot is blocked.

The corner is cleared.

Philippe Coutinho is involved in a couple of early moves for Barca.

The official attendance is 86,422.

The second half begins.

Barcelona bring on Philippe Coutinho for Oscar Mingueza at half-time. Reshuffle.

The last time Barcelona came from behind to beat Real Madrid in a La Liga game at the Nou Camp was in a 3-1 victory on 7 October 1989.

Ronald Koeman scored twice that day.

David Alaba is the fifth player to score on his Clasico debut for Real Madrid in the 21st century.

The others are (original) Ronaldo, Ruud van Nistelrooy, Raphael Varane and Jese Rodriguez.

Real Madrid are unbeaten in their last 34 La Liga matches when leading at half-time (W31 D3) dating back to 17 February 2019 against Girona when they lost 2-1.

It was the Giovanni Simeone show in Italy today. The Argentine scored all four goals as Genoa beat Lazio 4-1.

The half-time whistle goes and Real Madrid lead thanks to David Alaba's first goal for the club. A great goal too.

Rodrygo fouls a Barca defender and then hits his shot off the post but no chance that would have counted.

A nice Barcelona move, one of their best of the game, and Ansu Fati cuts inside Eder Militao and has a shot blocked by goalscorer David Alaba.

Karim Benzema goes down in the box as he collides with Eric Garcia while battling for a cross - but he doesn't appeal for a penalty.

Barcelona win a third corner and then a fourth. Casemiro heads away Memphis Depay's corner.

Neither goalkeeper has made a save yet (that actually counted as a save). David Alaba is the only player to hit the target so far.

Rodrygo is unmarked about 16 yards out and his shot is tipped over by Marc-Andre ter Stegen.

But Casemiro had handled earlier in the move so it wouldn't have counted.

Another quick Real Madrid counter-attack started by Thibaut Courtois. Karim Benzema crosses from the left and Toni Kroos' volley is blocked.

Barca have reacted quite well to conceding, mounting several attacks.

Eric Garcia wins a corner as his speculative long-range strike is blocked by Casemiro.

From the corner, Garcia eventually chips a cross into the gloves of the keeper.

That was David Alaba's first goal for Real Madrid.

He is the first player from Austria to score a La Liga goal in El Clasico since Hans Krankl for Barcelona on 23 September 1979.

So close. Memphis Depay takes the corner and Gerard Pique glances a header wide of the far post.

Pique scored their winner against Dynamo Kyiv during the week.

Barcelona win a free-kick and Lucaz Vazuqez puts it behind under pressure from Memphis Depay for a corner.