Andres Iniesta thinks he's already in China as he dawdles on the ball, with Marcelo winning possession and shooting over under pressure from his tunnel pal Gerard Pique.

Second half = under way.

Both sides make a change at half-time. And they're two pretty big substitutions.

Real Madrid replace Cristiano Ronaldo, who hurt himself in his goal, with Marco Asensio.

And Barcelona make a necessary tactical switch. Philippe Coutinho, who has done nothing wrong, makes way so Barca can bring on Nelson Semedo at right-back.

Image source, Getty Images

Gerard Pique and Marcelo having words in the tunnel. Marcelo giving Karim Benzema the eyes like 'what was that all about?'

Jay Barnes: Bale needs to move to another club that can benefit by having him and give him a lot more play time - a club like Burnley. Having already won the CL, he could also become part of a Europa League winning team next season

Race3: Bale has been abysmal in that first 45. No wonder Zizou considers him a reserve player. How he’s on the pitch after that DISGRACEFUL challenge on Umtiti I’ll never know.

Ramesh Kumar: karma is a boomerang. Barcelona players especially Suarez played all tricks to get Real Madrid defenders booked which they succeeded. But in the end they got their own medicine with that red card. Never mind the style of opponent be it the tik taka like Barca and Bayern or high press like Liverpool, Real Madrid have skillful players who can put together intriguing passes and create chances out of nowhere.

Is Barcelona's unbeaten record in real danger here? They have to play the second half with just 10 men - will Ernesto Valverde make a change at half-time. Nelson Semedo is an option to come on at right-back.

Three of Real's back four are on yellows - so nothing to say it's going to end 10 v 11.

Andy West
Spanish football writer at Nou Camp

Unrestrained fury from the Barca fans after that red card decision. The fans had been turning against referee Alejandro Hernandez for a few decisions – especially booking Messi for his foul on Ramos and his failure to caution Gareth Bale for his bad tackle on Umtiti.

Whether or not the decision was justified – and it probably was – is irrelevant to Barca fans, who sent Hernandez down the tunnel to a deafening cascade of whistles.

Image source, Reuters

Just seen about a million replays of the red card - Sergi Roberto gave Marcelo a thump on the shoulder. Stupid, although not the worst offence of all time.

Kev: How has bale not been sent off awful challenge and anonymous all half

Mick Brown: How is that not a red card for Bale? Awful challenge. Nowhere near the ball

Morgan: This El Clasico derby can get a bit feisty, can’t it?

You can try out our player rater for El Clasico today. You can rate all 22 players, or just however many you want - any time during the match or for 30 minutes after full-time. And you can see every player's average score.

Have a go here.

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hugo•middle: El Clasico is an absolute joke, the pettiest thing I've ever seen. Supposedly the best football game in the world is really just a series of childish, cheating spats

Seth Gogo Egoeh: I can't remember the last time El Clasico was not full of theatrics and trying to get opponent sent off. Most of these players should be in Hollywood! Incredible!

DeathApeDisco: Is Bale ever going to get back to full fitness? Shadow of himself.

Whistles at the half-time whistle as a host of players chat to the referee.

Cristiano Ronaldo whacks his free-kick straight into the wall.

Image source, Getty Images

This has become a textbook El Clasico - and Barcelona right-back Sergi Roberto has been sent off. Although it looks harsh. He gives Marcelo a bit of a whack but it didn't look like it was on the face - and it's a straight red card. Controversial.

Image source, AFP

Two minutes of injury time added on. Cristiano Ronaldo plays an ambitious ball to Gareth Bale, Samuel Umtiti gets there first and Bale drags his studs down the defender's leg. Lucky not to get booked. Very lucky.

You really don't see this often. Lionel Messi dives in with a challenge on Sergio Ramos, Luis Suarez's enemy of 30 seconds earlier - and gets a booking himself.

Image source, Reuters

Fisticuffs! Luis Suarez is down after Sergio Ramos catches him with an arm. Ramos tries to 'help' him up. Suarez gets angry then jumps to his feet to confront the Real Madrid captain!

Both players are booked.

Image source, Getty Images

Good chance for Barcelona - Philippe Coutinho plays an excellent ball through to Lionel Messi. He's so good in these positions that you'd usually back him to take it round Keylor Navas and tap home - but the Real Madrid keeper denies him.

Image source, Getty Images

Dennis Ethan: Real Madrid so dominant after equalizing but playing long balls when reaching Barcelona box

Real Madrid are edging this at the moment. A good spell of possession as Cristiano Ronaldo wins the ball in his right-back position. It ends with Karim Benzema cutting in from the left and shooting across goal and wide - it was like he forgot to curl it in.