That's enough from La Liga for now as we switch gears for the FA Cup quarter-final. See you over there.
- Messi with another hat-trick - inside 11 minutes
- Barca go top of La Liga
- Suarez gets two; Alves sent-off
- Real Madrid lost on Saturday
Messi in the Premier League? I doubt it would ever happen, but I'd love to see it.
One thing I don't really understand is how FFP rules would affect a possible transfer. If Messi is worth, say £300m, I don't think anyone would be able to buy him would they?
Steve Howes: Messi hat trick....yawn. Of course he and Ronaldo are happy to bag so many goals without breaking sweat. Makes good stats.
Ankur Goel: Would love to see Messi play in PL so that this discussion can end forever. Mr. Wenger are you listening?
Reece Young: Messi scores once every two games for Argentina. Nothing to do with the league or the team. Just pure class. Let's just admire
Heddwyn from Carmarthenshire: People go on about how the PL is so much better than La Liga, but where's the proof? They play more attractive football and, if you actually look at the two leagues in terms of points, there isn't much to split them, so you can't really say it's less competitive.
Dave, Bedford: Whether Messi would score as much in a different league is missing the point, he wouldn't score as many in any team other than Barca - who are tailor made to suit him. Doesn't score as freely for Argentina does he? That said he's far and away the best footballer I've ever seen. Only Zidane comes close, and not that close to be honest.
Paul, Cardiff: Bueno earns it Bueno scores it ! I think all penalties should be taken by the player that earns the penalty! Stops top strikers nicking goals off their teammates.
Lionel Messi has 32 hat-tricks for Barcelona in all competitions. Cristiano Ronaldo has 27 for Real Madrid. Twenty-seven! Rubbish.
Rampant, rampant Barcelona. But all credit to Rayo Vallecano for their approach. They contributed a lot to that game.
What a wonderful entertaining display from Barcelona. Lionel Messi sends in Luis Suarez, he skips around the keeper and hammers in the sixth.
You can be too unselfish at times! Luis Suarez is clean through again, he should score but tries to find Lionel Messi for a tap-in and overdoes the pass!
Barca really could have had 10 today.
Jeff Smith: Re Robin - I watch la liga week in week out, premier league is nothing compare to La liga, they are actually talented players in Spain not like your long ball traits in the prem league.
Garry, Bristol: Messi seems to break record upon record in Spain, time for a new challenge? The greatest.
Showboating at 5-1 down! Class from Rayo as the defender backheels the ball past Lionel Messi to find his goalkeeper.
It's 10 v 10 now but it's still men v boys. Barcelona carve open Rayo with a wonderful move, Luis Suarez curls in a strike and it's yet another great save from Cristian Alvarez!
Tom Holmes: Messi once scored 4 against Arsenal. He'd rip the EPL to shreds.
Richard Jebb: Laughable statement from Robin Davies, and also wrong!
Girma Kassie: Spanish la liga poor? Must be kidding. Do we need flying tackles to make it better? Messi is brilliant. You have seen him!!
Alberto Bueno - who was the man brought down by Dani Alves - lashes in the penalty.
Dani Alves is the last man and he slides in - did he get the ball? The referee says penalty and a red card for the Barcelona right-back.
We were just having a similar debate in the BBC office Robin. To be honest, I think he'd score a few against QPR and Leicester.
Robin Davies: 24 hat-tricks for Messi but in a poor league, he wouldn't get 8 in the Premier league
Dani Alves pings a 30-yarder onto the roof of the net, they're all having a go now.
That's now 24 hat-tricks in La Liga for Lionel Messi - a record.
Just think about that for a moment. Twenty-four.
Does it ever get boring for Lionel Messi? Shooting fish in a barrel. What a player, what a goalscorer, what a machine. Scoring goals like Wayne Gretsky.
Just brilliant again! Lionel Messi with yet another hat-trick, he collects the pass from the left, dances between two defenders, goes round the keeper and slides it in. Three goals in 11 minutes.
Lionel Messi bends the free-kick around the wall and it's a great stop from the flying Cristian Alvarez!
Barcelona bring on Rafinha for Andres Iniesta. Lionel Messi wins a free-kick on the edge of the box, this could be the hat-trick...
An unbelievably good touch from Luis Suarez to pick the ball out of the air, Suarez gets a shot off, it's only parried out and Lionel Messi has a tap in.
He has scored 40 goals for the season now - for the SIXTH SUCCESSIVE SEASON. Ridiculous.
Good luck trying to tell Lionel Messi that he's not having spot-kicks any more. I agree though - that first penalty was terrible. Made Gareth Southgate look powerful.
Michael Powell: Messi gets a reprieve, but still missed first pen. Time for someone else to take over Barca's spot kick duties?
Afolabi Shobowale: Messi bailed out by the referee there, that first penalty was dreadful
Barca coach Luis Enrique decides he doesn't really need a holding midfielder in this situation so Javier Mascherano is off and on comes Ivan Rakitic.
This could be a cricket score now. Barca three up and a man advantage. Half an hour to go.
Lionel Messi takes advantage of his reprieve by burying the retake into the other corner.
That's a terrible penalty! Lionel Messi has a tame penalty saved. But hang on, he is going to be allowed to take it again for encroachment!
Two yellow cards for Tito equals a red. Off you go.
There's a rugby tackle on Luis Suarez at the back post - penalty all day long.
Brilliant stop! Andres Iniesta lashes in a left-footed drive and Rayo keeper Cristian Alvarez pulls off a cracking one-handed stop.
This is now Gerard Pique's best ever season for goalscoring, that's his sixth of the campaign. Rayo continue to be adventurous and they are so close to a goal too, a stretching Leo Baptistao gets a shot in and it's deflected just past the post.
It has been coming! Dani Alves heads a corner against the far post, it comes back out and Gerard Pique is in the right place to force the loose ball home.
If Rayo continue to squeeze up the pitch there could be plenty more goals to come.
The free-kick is put in the middle, Gerard Pique with a cracking touch to bring the ball under control but he can't quite squeeze off a shot.
More of the same from Rayo, a high line asking for trouble. Barca win a free-kick on the left.
Here we go, the sides are back out. Attack! Attack! Attack, attack, attack!
If, like me, you find this early kick-off time odd - we're in the wrong. There are 87,151 inside the Nou Camp - the best attendance of the season.