Lucas Vazquez looks in real discomfort. With seconds until the break, I wonder if they'll have a look at him at half-time.

Barca midfielder Ivan Rakitic cuts across Lucas Vazquez, who is down hurt and needs treatment This has been niggly.

Almost great football by Barcelona. Well it was great until the final bit. Lionel Messi plays an exquisite one-two with Luis Suarez and picks out Ousmane Dembele. The winger shows some dancing moves to beat a defender but his cross is past everyone.

Barca try to counter and Toni Kroos wipes Lionel Messi out. A proper hatchet job. He's lucky not to get booked there. Luis Suarez was also fouled by Sergio Reguilon in that move.

Real Madrid deserve to be ahead by now. This is a wonderful counter. Karim Benzema picks out Lucas Vazquez, whose first touch on the right wing is perfection. It finds its way to that man again Vinicius and his shot is blocked by Nelson Semedo.

Vinicius has had four of the six shots in this game so far.

John McEnerney: Barcelona have shown their credentials this season. Real haven’t showed much. No better time than now to stand up and be counted. So called big game players need to turn up in big games. Yes Toni, Luca I’m talking about you & others you know who you are!

When Vinicius Jr learns how to finish, he'll be one of the world greats.

Lucas Vazquez whips in a low cross which Vinicius, facing sideways and maybe the ball slightly behind him, has to shoot first time from 10 yards out and it's over the bar.

Real Madrid should be ahead now. Casemiro plays a brilliant pass into Vinicius Jr, who is in on goal but his first touch takes him wide and his shot is blocked.

He gets the ball back and picks out Karim Benzema, 10 yards out, and the Frenchman shoots right at Marc-Andre ter Stegen.

Barca passing the ball round in midfield and it hits the ref, giving possession to Real. The hosts come forward but Vinicius' cross is blocked.

I would not like to imagine the conspiracy theories if they'd scored there.

It's not been a Classic. Oh.

Better from Barcelona as Ousmane Dembele's low cross just goes past everyone in the centre. Luis Suarez inches away.

Lionel Messi wins a corner for Barcelona off Dani Carvajal. They work the corner to Ivan Rakitic but his long-range shot is blocked.

Real fans whistle as the referee gives them a free-kick but they want an advantage. Nelson Semedo bodychecks Sergio Reguilon, as the ball breaks free for Vinicius. The referee waits for the winger to enter the box before calling it back for a free. Odd.

A good battle between Ousmane Dembele and Dani Carvajal. First of all Dembele speeds away but then overruns it and Carvajal gets back to win a goal-kick off the Barca winger.

Another Vinicius Jr chance. Karim Benzema crosses, it's not properly cleared and Vinicius swivels and shoots but his shot is stopped by Marc-Andre ter Stegen.

Luka Modric whips a great ball over the top to Lucas Vazquez but Jordi Alba just nips in to cut it out.

We are a quarter of the way through this game. Or 5/8th of this tie if you prefer.

Sulaimon Adelekan: Oh no VAR. That was a penalty in my books. Messi seems invisible for now in the game but we all know what he can do

Barca break at pace and Ousmane Dembele's low cross to Luis Suarez is cut out by Raphael Varane. Had that made it through to Suarez, it would probably have been 1-0.

First proper chance of the game. Sergio Reguilon finds Karim Benzema, who picks out Vinicius Jr and the teenager shoots over from 15 yards out.