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Defender Gerard Pique scores. What was he doing up front?

Yet again Neymar, Luis Suarez and Lionel Messi combine. Pique is left just to tap in Argentine Messi's square ball.

Pique celebrates and is then makes way for Marc Bartra.

Pique spent the last 10 minutes of El Clasico up front sniffing a goal. A maverick.

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Bayern defender Holger Badstuber is shown red for bringing down former West Brom forward Brown Ideye.

Hope for the Greek club?

Excellent play from Baba Rahman as he eats up ground down the left before picking out Eden Hazard in the middle. Is it a tap-in for the Belgian? No, he just doesn't get there and it's cleared. A lack of conviction there. 

Brilliant from Alexis Sanchez. Brilliant skill to perform a seal dribble past four men, bobbing the ball along almost on his nose. 

Remember Kerlon?

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Eden Hazard has got lots of strings to his bow but tracking back is not one of them. He just points at his man, Eli Dasa, as if hoping that someone else will pick him up. They don't, Dasa is in on goal but Asmir Begovic makes a top-class stop.

Eddie: Flamini with 35 passes so far; 2nd only to pass-master #Cazorla, external. Blimey..certainly grabbing his chance to impress.

And now Chelsea are back in play in Haifa. As it stands it won't be quite enough to see them qualify tonight. They need to better Dynamo Kiev's result in Porto. 

Arsenal out flying, Santi Cazorla hammers a shot on goal before Olivier Giroud flicks a header which causes Eduardo to make a decent save. 

As a short aside, if you can find me a team who have had a better few days than Northampton Town I'd like to hear it.

And if you like a great post-match interview (a rare beast) track down Chris Wilder's interview at Notts County on Saturday.

Here endeth the lesson.

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In League Two, Northampton - who have this week taken a huge step towards financial survival -  are currently on their way up to second in the standings as they lead 2-0 at Crawley at half-time.

In other games, Leyton Orient are also winning away from home. They are 1-0 up at Plymouth.

In fact, it is a good night for many away sides in the division so far. Cambridge United are winning 3-1 at Morecambe,Exeter lead Mansfield 2-0 and Newport are 1-0 up at Oxford United.

Jermaine Jenas
Ex-Spurs and England midfielder on BBC Radio 5 live

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"For me, if Rooney's fit, he should play for Manchester United against PSV Eindhoven. He's the captain and he's the best option up front."

Back under way.

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In domestic action, Gillingham are looking to close the gap on leaders Coventry in League One and they are 1-0 up against Rochdale, Bradley Dack with the goal. Coventry are currently being held goalless by Bradford.

Elsewhere, struggling Swindon are 1-0 up against high-flying Walsall at the break in League One, Jon Obika with the goal, while Shrewsbury and Southend are looking good for away wins. They lead Oldham and Sheffield United 2-0 and 3-1 respectively.

Barnsley, in the relegation zone, are drawing 1-1 at Peterborough, while Colchester are 1-0 up at home to bottom-of-the-table Crewe.

Barcelona played 421 passes in that first half, or 9.35 a minute. Or one every six seconds. Ish. 

Luke: How did the Premiership clubs overlook Douglas Costa for £20m? He even makes Hazard look useless.

Image source, AP

Luis Suarezscores his second with a ridiculously good finish.

The former Liverpool forward volleys in from 15 yards out with the outside of his boot. A stunning strike.

Roma want to hear the full-time whistle, not the half-time whistle.

Can anyone stop Barcelona? Maybe Bayern Munich. Maybe...

Image source, EPA

Bayern Munichare set to claim top spot in Group F thanks to goals from Douglas Costa, Robert Lewandowski and Thomas Muller that have put them 3-0 up at second place Olympiakos.

Barcelonaare 3-0 up against Roma. Goals from Luis Suarez and another sublime effort from Lionel Messi, making his first start since injury. Well, well , well worth a watch if you can. 

Chelsea a goal up and a man up.

An excellent 45 minutes for Arsenal.

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Jeroen Verheggen: All I want for Christmas is a world class striker and holding midfielder and we could win @ChampionsLeague, external with @Arsenal, external.

Goonerama: Excellent. Now, you know best Arsene, but... *please* give Sanchez 45 mins' rest and bring on Chambers alongside Flamini.