Thanks for joining us today. The big game tomorrow on the continent is title-challenging Inter Milan v struggling Serie A champions Juventus. That one's a 19:45 BST kick-off - with the live text starting around 19:15.
The top of La Liga has a familiar look to it. Real Madrid are top from Barcelona on goal difference.
But that could change tomorrow when Villarreal play Celta Vigo (11:00 BST). A win for the Yellow Submarine would take them back to the top, while a Celta victory would see them squeeze in between the top two on goal difference.
The last time Barcelona finished a La Liga game with less possession than their opponents was September 2013 - also against Rayo Vallecano (45.73%).Copyright: #bbceurofooty
Andre Gomes has just put Valencia 2-0 up against Malaga, smashing the ball past Carlos Kameni at the near post after picking the ball up outside the box and beating three defenders.
Barca have conceded 11 goals so far in eight games. This time last season they hadn't conceded one!
A year ago tomorrow they became the first La Liga team in history to open a season with eight consecutive clean sheets.
I know some people admire good defending as an art. But give me total chaos and mayhem any day.
A brilliantly farcical game where defending was seemingly banned comes to an end.Copyright: Getty Images
This game is just petering out.
Rayo keeper Tono had gone for a walkabout and Luis Suarez considers chipping him, but instead tries to play it to Munir El Haddadi, but a defender cuts it out. Probably should have been 6-2 there. We're in the last minute now.
Barcelona fail to deal with a cross properly and Jozabed volleys into the bottom left-hand corner. Rayo have deserved a goal for their second-half performance.
Rayo Vallecano haven't stopped playing yet and Patrick Ebert blazes a shot over after Gerard Pique fails to clear properly.
- Copyright: EPA
Barcelona make their final change as Douglas replaces fellow Brazilian right-back Dani Alves. I could come on at full-back at this stage, mind, and Barca would still win.
Four goals and an assist for Neymar. This time the Brazilian crosses to Luis Suarez, who smashes home at the far post.
This scoreline doesn't tell the story of the game at all. Rayo were dominant at the start of the half.
Barcelona make a change as captain Sergio Busquets is replaced by B team player Gerard Gumbau. Gerard Pique takes the armband.
Luis Suarez clashes with Rayo defender Ze Castro and the Uruguayan is holding his teeth...
But this time he hasn't tried to eat his opponent, it was only a clash.
This scoreline is harsh on Rayo, but Barca's version of events is even harsher...
It's four goals for Neymar. It's turned into a rout - and that's so harsh on Rayo Vallecano. Luis Suarez squares the ball to his strike partner, who turns the ball into the empty net.Copyright: Reuters
I've really jinxed this for Rayo. Apologies Vallecano fans.
Neymar pulls the ball back for Luis Suarez, whose shot from the edge of the box is parried by Tono down low in the corner. The rebound lands to Neymar, who smashes the ball into the roof of the net.Copyright: Reuters
Barcelona without Lionel Messi, Xavi or Andres Iniesta really lack the invincible feel of the great Catalan sides of recent years. They are looking very mortal here.
They have another chance as Lass Bangoura is played in around the corner of the box. Unfortunately for him and Rayo he can't lose his defender and get a clear sight at goal and his effort is deflected out for a corner, which comes to nothing.
You feel like there's a goal coming for the visitors. They'd deserve it.Copyright: EPA
Lass Bangoura hits the side-netting for Rayo - they have been brilliant in this second half so far. This game is so far from won for Barcelona.
Terrible play from Barca keeper Claudio Bravo almost let Rayo in for an equaliser. He kicks the ball straight at Jozabed and has to scramble to just about punch the ball away. It could have gone anywhere.
This has been a very open, entertaining game and Rayo Vallecano defender Diego Llorente - on loan from Real Madrid - forces a good save from Claudio Bravo.
Neymar is in for a hat-trick, he's in space, but he's very unselfish - too much so in fact - and he tries to square it to a team-mate in the centre but Rayo clear.
The best option there was definitely to shoot.Copyright: EPA
Barcelona make a change and it's a wasted chance for Sandro today. He got the nod to start ahead of fellow youth-team product Munir El Haddadi but did very little, bar waste a good chance. He slams a bib in anger when he reaches the bench.
Munir replaces him with the chance to be Lionel Messi's replacement for the next few weeks up for grabs.
Almost a huge moment as Luis Suarez expects to see Rayo Vallecano keeper Tono sent off. The Uruguayan is slipped through on goal and Tono comes flying out of his box and handles it as he slides on the ground.
Suarez thinks Tono is going to be sent off but instead the referee has called it back for offside. I presume the keeper must have seen the flag. Maybe.
Rayo Vallecano have started this half brilliantly. They should really be level - Claudio Bravo is keeping his side in it. Javi Guerra forces the Chilean into a good save from near the penalty spot and the keeper charges out to keep Patrick Ebert's rebound out.
Javi Guerra times his run brilliantly - Jeremy Mathieu has no chance of catching him - and controls a ball over the top but Claudio Bravo gets down low to save his shot from 16 yards out.
Rayo Vallecano made a change at half-time as Nacho - who conceded one penalty and should have also given away another - is replaced by Chechu Dorado.
Rayo Vallecano come out on the attack and Lass Bangoura finds Patrick Ebert on the edge of the box. The German, with his back to goal, is overly ambitious and skews his shot wide.
Barca get us going in the second half.
Rayo Vallecano had 51% of possession in the first half. The stats legends at Opta have just told me that the last time Barca finished a La Liga game with less possession than their opponents was September 2013 - also against Rayo. (45.73%).
Torino are playing mid-table AC Milan at the moment in Serie A. That's 0-0 after about 35 minutes.Copyright: AP
No injury time despite three goals, two penalties, a disallowed goal and two more penalty appeals.
Great game.Copyright: AP
Neymar should have won a third penalty in the first half. Nacho slides in near the edge of the box but takes the man and not the ball. Poor decision by the referee.
You don't see this often - Barcelona getting edged on possession stats. At the Nou Camp.Copyright: .
Neymar breaks down the left for Barcelona and gets the ball back to Sergi Roberto, whose curling shot from 20 yards is touched wide down low by Rayo keeper Tono.
Roberto Trashorras, once of Barcelona, and Sergio Busquets are scrapping away as a corner is played in. The Rayo forward gets his head onto it but the referee calls it back for a free-kick.
If anything Busquets was fouling him more than the other way round. But the strikers very rarely get a decision in those circumstances.
- Copyright: AFP
Rayo Vallecano certainly aren't giving up on this and Patrick Ebert forces a save from Claudio Bravo from about 20 yards with a low effort.
Neymar, with a short run-up, sends Tono the wrong way again - putting it in the different corner this time. Barca lead a fascinating game.Copyright: AP
And now it's seven.
Neymar, who is on fire, nutmegs Nacho, who brings him down with his trailing leg.
Baffling play from Gerard Pique, one of the world's top centre-backs. The Spain international can't head it back to Claudio Bravo so instead just boots the ball up into the air, Garryowen style (token Rugby World Cup reference).
Rayo win a corner from which Javi Guerra has a header on target but it's straight at Bravo.
This is like a game of Fifa (other computer games are available). it's attack after attack from Barca - players constantly running at defenders.
Neymar could be on about four goals by now, this time he sends a Rayo defender one way and then the other and fires his shot just wide of the far post.
- Copyright: AFP
This is a brilliantly open game - could see a few more goals in this one. Sandro is played in, 18 yards out, is this his chance to cement his place in the Barcelona team in Lionel Messi's absence?
No, no it's not. The 20-year-old screws his shot badly wide - and high. Poor effort.
Barcelona think they are ahead as Neymar curls a shot home from 16 yards. Luis Suarez and Gerard Pique are both in offside positions in the centre. Not sure if either of them got a touch or were just interfering with play. Either way it's ruled out.
Neymar sends Tono the wrong way with a cool, low kick into the corner. Diego Llorente has really cost his side here.Copyright: AP
It's the same players again but this time there's no doubt. Diego Llorente brings down Neymar with a terribly timed tackle. Penalty.
Barcelona forward Neymar wants a penalty as Diego Llorente puts hands on him on the edge of the area. The Brazilian went down easily but - to use a classic cliche - you've seen them given.
Wow. Wow. Wow.
I was slightly condescending in tone about some of Rayo Vallecano's forwards before kick-off but they have proved me wrong!
Rayo play a short corner and Bebe fires in a brilliant low cross which Cardiff City flop Javi Guerra slides home from a yard.Copyright: AFP
It was almost the moment! Bebe has a chance to run in on goal but a bad touch lets Jeremy Mathieu get the ball out for a corner. It was a brilliant flick by Patrick Ebert to put the Portuguese forward in on goal there.
For those of you who live in the UK - or have access to BBC One - here's tonight's Match of the Day running order.
We asked on our BBC Match of the Day Facebook page if Bebe would be Barcelona's undoing today.
Alex Kirk: Bebe is better than Messi
Aron Bagnall: Bebe what a player mate
Lee Linnell: He actually played well for United whenever he got the chance. His goal against Wolves was quality!
Conor Byrne: Is this some sort of sick jokeCopyright: Getty Images
Tono pulls off a great save to keep Luis Suarez out, although it would have been the keeper's fault if it had been a goal.
His kick goes straight to Sergio Busquets, who plays a first-time ball to an unmarked Suarez 10 yards out - but Tono denies him brilliantly with his foot.
The corner comes to nothing. And a minute later Barcelona should be ahead.
Ivan Rakitic is found in acres of space by a brilliant Sergi Roberto pass - he's got all the room in the world - but keeper Tono stands tall and keeps out his effort from just inside the box.
Had that fallen to a striker, that's 1-0.
Corner to Rayo Vallecano as Lass Bangoura runs at Barcelona's defence and Jeremy Mathieu gets it out.
Neymar does take the free-kick but it's deflected high and keeper Tono deals with it.
Barcelona break at pace and Neymar wins a free-kick just outside the box after a double-footed tackle by Razvan Rat.
The Brazilian looks like he's going to take it.Copyright: Reuters
Rayo get us under way at the Nou Camp.
Do you reckon there's a single Rayo Vallecano fan out there with Bebe on the back of his jersey?
Or a Manchester United one for that.
Eibar and Sevilla drew 1-1 earlier, Kevin Gameiro levelling for the visitors.
Two more La Liga matches later tonight - Valencia host Malaga at 21:00 BST and five minutes later Real Betis are at home to Espanyol.
Anyone know what's going on there?
- Quote Message: Perhaps it is a good time to be going to Camp Nou. These international breaks, we don’t know just how much they affect a team like Barca, but it is true that we don’t have so many international players and we have had a more settled build up to the game. from Rayo Vallecano striker Javi GuerraCopyright: Getty Images
- Copyright: EPAQuote Message: Rayo Vallecano don't let you have the ball easily and they make you very uncomfortable. If we aren’t sharp, they can take possession and control the ball. The key is to not lose the ball and to be good defensively. We will have to force them into making mistakes. from Barcelona boss Luis Enrique
- Copyright: .
Cristiano Ronaldo officially became Real Madrid's all-time top scorer today with a goal as they beat Levante 3-0 in La Liga.
The 30-year-old Portugal forward scored his 324th Real goal in 310 games to overtake Raul's record.
The club had already considered Ronaldo the record holder as they credit him with a goal deflected off Pepe in 2010.
Ronaldo's official record-breaking strike came after an hour from just outside the box - either side of goals from Marcelo and Jese.
After scoring twice in a 2-0 win over Malmo last month, Real held a presentation to give Ronaldo a trophy for breaking the record.
Barcelona haven't looked too hot this season even before the injury of Lionel Messi.
How will they cope without their talisman for two months?
Let us know your thoughts on that - or anything else - using #bbceurofooty on Twitter.
- Copyright: Getty Images
Barcelona - without Lionel Messi - start with Sandro up front next to Neymar and Luis Suarez. He gets the nod over fellow 20-year-old Munir El Haddadi, who is on the bench.
Rayo Vallecano, who are 15th, start with a strike-force of Manchester United legend Bebe (seven games with united, two goals) and Cardiff demigod Javi Guerra (five Bluebirds games, no goals).
Barcelona: Bravo, Alves, Alba, Mathieu, Pique, Sergi Roberto, Rakitic, Busquets, Suarez, Neymar, Sandro. Subs: Ter Stegen, Douglas, Mascherano, Bartra, Adriano, Gumbau, Munir.
Rayo Vallecano: Tono, Nacho, Llorente, Ze, Rat, Jozabed, Trashorras, Bangoura, Bebe, Ebert, Guerra. Subs: Chechu Dorado, Miku, Raul Baena, Manucho, Adri Embarba, Juan Carlos, Alex Campos.
- Copyright: EPA
In fact Barca are so short of players, they are considering going to the Court of Arbitration for Sport in their bid to register another.
With Rafinha out for six months, the Spanish and European champions want to register fellow midfielder Arda Turan.
The Turkey international cost them £24m in the summer from Atletico Madrid, but they are not allowed to register him until January because of a transfer ban.
- Copyright: Getty Images
No Lionel Messi.
No Andres Iniesta.
No Thomas Vermaelen or Rafinha.
A defeat in their last game at Sevilla.
How will Barcelona cope without their injured quartet today?