The match is under way! It's Osasuna against Barcelona.

That opportunity for Osasuna just illustrated how even when Barcelona are well on top they can be vulnerable at the back. That will give the home side some encouragement.

LET OFF FOR BARCELONA! First chance of the match for Osasuna, and it was a good one! De Las Cuevas sent a pass to the back post, but Riera couldn't force it home on the slide.

What has been impressive from Barcelona is the energy in the centre of the pitch. This is the first time that Gomes has brought drive and dynamism to the Barca midfield.

Now it's Arda's turn to have a shot on goal, but the Turkish international has his effort blocked. How Barcelona aren't ahead by now, I do not know. They have played really well so far.

There's the first booking of the match and it's for a late tackle on Alba. That was deserving of a yellow card.

WHAT A SAVE! Messi is clean through on the Osasuna goal once again, played in by Suarez, but Nauzet was alert to his chip and managed to push the shot over his own bar.

It's quite remarkable that Osasuna are still level in this game. Barcelona have been all over them. More so, the Catalans are creating chances in front of goal as well.

The pressure is building on Osasuna again. First, Suarez has a volley deflected wide for a corner kick. Then Iniesta tries his luck from the edge of the box, but his shot drifts wide.

Alba is playing as a left winger rather than a left back in this first half. Of course, that's not totally unsual for him, but he is being afforded a lot of space down the wing.

The Ballon d'Or ceremony is on Monday and two Barcelona players are considered to be in the running for it. Will Messi win it again? Or will Suarez lift the award for the first time?

This is quite astonishing control from Barcelona. Osasuna are hardly having a touch of the ball. They simply can't get near it. However, the visitors aren't doing a great deal with it. At least in the last 10 minutes.

It's feasible that this could turn into quite a frustrating afternoon for Barcelona. Osasuna look a lot more solid at the back. It will be up to the Catalans to break down the hosts.

Osasuna have somewhat weathered the storm which was raging about 10 minutes ago. Barcelona had built up momentum, but they have now taken their foot off the gas a little.

Busquets is another Barcelona player who has come in for a lot of criticism in recent weeks, but his performance in the Clasico demonstrated just how good he can be at his very best.

Roberto has had a rough few weeks, coming in for a lot of criticism, but he is enjoying himself in the opening 20 minutes of this game. He's being afforded plenty of space down the right.

I'm Graham Ruthven and you can catch me on Twitter throughout the game to let me know your thoughts. Is Lucho right to favour Gomes over Rakitic? Is this Barca's strongest team? Tweet me!

It's just attack after attack for Barcelona at the moment. I'm not sure what Osasuna's game plan is, but whatever it is it's really not working. They are pretty much hanging on for half time. Already.