- Real Madrid take 3-1 lead heading into the second leg at the Santiago Bernabeu.
- Gerard Pique own goal gave visitors the lead before Lionel Messi equalised from the penalty spot after Luis Suarez was brought down by Keylor Navas.
- Cristiano Ronaldo came off the bench to score a wonderful second and was booked after taking off his shirt in celebration.
- Three minutes later he was shown a second yellow card for simulation after going down while through on goal.
- Marco Asensio settled the first-leg with a stunning effort a minute from time.
- Second leg to follow in the Spanish capital on Wednesday (16 August).
What an explosive end to the first Clasico of the season. Let's hope for more of the same on Wednesday for the second leg.
Full-time: Barcelona 1-3 Real Madrid
What a strike from Asensio! He's just killed off Barcelona here with a goal that might just outshine Ronaldo's. Lucas Vasquez leads a counter attack with three Barcelona defenders ahead of him and Asensio his only support. He finds the 22-year-old who takes a touch just outside the box before unleashing a stunning left-footed drive into the top corner. And I mean right in the top corner; impossible to save.
Goal! Barcelona 1-3 Real Madrid (Marco Asensio, 89)
After that red, Ronaldo clearly shoved the referee as he made his protests. He could pay for that.
He was on the pitch for 21 minutes in all. That was some cameo.
SCENES! Ronaldo is gone! He thinks he has a penalty after going down inside the Barcelona box under pressure from Umtiti, but the referee decides it was a dive. Having been booked a moment ago for whipping off his shirt in celebration, another for simulation means he is gone!
RED CARD - Cristiano Ronaldo
What a strike from Ronaldo! Barcelona have a chance of their own but Real are able to break at pace with Isco sliding a perfect pass through for his teammate from just inside his own half. He cuts inside as we have seen him do so many times, dragging it inside Pique before unleashing a wonderful strike into the top corner.
Of course, the shirt is off as he celebrates.
Goal! Barcelona 1-2 Real Madrid (Cristiano Ronaldo, 79)
Barcelona nearly get a second! Messi elegantly skips past a couple of challenges as he drives through the heart of Real Madrid before slipping the ball through for Luis Suarez. He looks to the far corner, but drags his effort just wide.
No mistake from Lionel Messi, he sweeps the ball into the bottom corner, sending Navas the wrong way.
Goal! Barcelona 1-1 Real Madrid (Lionel Messi, 76)
The ball breaks to Suarez in the box and he gets the first touch to knock it past the onrushing Navas. Suarez goes down and the referee points to the spot!
PENALTY - Barcelona
What a miss from Busquets! Denis does well to force the ball across the face of goal but the midfielder lifts his shot clean over the bar from six yards out!
Luis Suarez won't be too happy with Denis Suarez after that. Slid through by Luis, Denis opted for a shot, attempting to curl one into the far corner. He gets it all wrong however and lifts it harmlessly into Navas' arms when the pass to his namesake was on.
Ronaldo has the ball in the back of the net! Moments after Marcelo stung the palms of ter-Stegen with a vicious drive, the Portuguese star is slipped through to slide on past the Barcelona goalkeeper but he was stood half a yard offside.
Bale lifts another cracking cross into box with Ronaldo standing there with his back to the goal. There is only one thing on his mind; he attempts a spectacular bicycle kick but the connection isn't right and he slices over.
Kovacic won't be able to continue here, he's jarred his ankle after his studs got caught in the turf. Marco Asensio comes onto replace him for the final 20 minutes.
Iniesta meanwhile has come off too with Sergi Roberto replacing the Barcelona maestro.
Varane almost does a Pique as he pokes Suarez's cross dangerously close to his own goal. He breathes a sigh of relief as it bounces out for a corner.
Kroos pounces on a loose ball and drives forward, looking for Ronaldo who is breaking to his left. He gets the ball and drives inside the box, dropping a shoulder looking for room to shoot but Pique stands him up well and forces the corner.
Real come forward again and Bale swings a peach of a cross into the box from the right for Isco, but he can't direct his header on target. Isco has been sensational at times this evening, but probably wouldn't be your first choice player to have in that position.
Barcelona will make their first change too with Deulofeu coming off for Denis Suarez.
Boos ring out around the Nou Camp which can only mean one thing; Ronaldo time. He comes on to replace Benzema with just over half an hour to play.