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Sid Lowe has signed off
Would Barça have been better off without Messi last night, given he didn't look fit and struggled to get into the game?
Assuming they don't make it through at the Nou Camp, do you think Barcelona will act in the summer to relieve their dependency on Messi? How can they do that?
Nasir Aminu asks:
Do you think Mourinho will tweak his formation due Barça's loss?
Barney Tesler asks:
End of an Era?
Has it been mentioned much in Spain how much Gerard Pique has regressed over the last couple of years from one of the world's best to a bit shaky? Will Barcelona finally signed recognised centre-backs to replace him and Puyol, who is starting to show his age?
Do you think the repercussions of the Barcelona thrashing will have any effect on the way the national team will play? Would Del Bosque pick a more physical team if they were to face Germany at next year's World Cup?
Do you think some of Barcelona's decline could be put down to their insistence on buying centre-midfielders and converting them to centre-backs? Rather than worry about whether or not their defenders have good ball skills should they not buy a Thiago Silva or a Vidic, someone a bit more "no-nonsense"?
Does Barca's bizarre and possibly arrogant failure to reinforce in defence suggest they believed their own hype – that you don't need defenders when the other team doesn't have the ball? Was it just a matter of time before a team strong enough to have a good proportion of the play took advantage?
What is the reasoning for the lack of intensity and high pressing under Tito, compared to the Barça of Pep?
Do you think the scoreline flattered to deceive last night? Bayern were the better team throughout and were fully deserved winners. However, the second goal was offside and there was a clear foul in the build-up to the third, and the fourth was relatively easy against demoralised opposition. Is there any sense that Barçca were were hard done by in the margin of defeat?
There is much talk of a Plan B but we have seen this season that Barcelona do not execute Plan A anywhere close to their abilities. They don't pass the ball around quickly, they misplace passes and they don't pressure the opponents when they lose the ball, which exposes their defence. In the two seasons they won the Champions League, their defence was very good. What changes do you expect during the summer?
Some great stats from patrickrennie
Will Alex Song leave Barca this summer? It would be funny if he crawls back to London Colney, and Arsene says "So, come crawling back eh?" To which he replies: "Seems like the classy thing to do would be to not call attention to it." Ah, classic Simpsons.
Michael Chapman asks:
If Madrid win the CL, could this also signal a changing of the guard in the Ballon D'or category? Could this finally be Ronaldo's year?
Tibor Heskett asks:
Do you think another German onslaught is on the cards tonight?
Was last night proof of actually how good a manager Pep Guardiola was at Barcelona - and that he had a more of a tactical influence over the team than others first thought?
What thoughts are flying around about Vilanova's future? Barcelona are not the type to adopt the merry-go-round policy in terms of managerial appointments, but in light of last night's admittedly abject coaching display and Vilanova's deteriorating health, are there concerns in the club hierarchy that Tito cannot provide the next step for Barca?
Will Barcelona revise their approach to recruitment and actively try to buy defenders from the rest of Europe? Like Hummels for instance?
Do Bayern really need Pep? Their current style is better than tiki-taka, so why switch?
Do you think that the Spanish governments (national, regional and local) will ever demand full on-time payment of taxes. Could La Liga survive if this were to happen?
The Puyol/Pique partnership has been less than reliable over the last couple of years, with an over-reliance on central midfielders to cover this position. Why have Barca not thought to re-enforce this area with a specialist defender?
Do you think that playing Alves and Alba in the same team inherently weakens Barca, given that both are predominantly inclined to attack and position themselves very high up the pitch? Would someone like Abidal provide some balance and the ability to convincingly step across into a back three make them more secure at the back? They've never been air-tight but have looked increasingly more porous as the season has gone one.
Great to see Barcelona stuffed. One-man team without a fully fit Messi?
What do you think the likelihood of Barcelona getting a new manager after this Bayern result? And if not, who do think Tito Vilanova will bring into the team over the summer transfer?
Do you think German clubs will start to dominate in Europe now or is it a false dawn? Because if Bayern manage to get Lewandowski along with Gotze, will it not be difficult for German clubs to dominate? It's just going to be Bayern, no?
Defending aside, is Guardiola to be blamed for the current Barcelona slump or may be a free fall? His rather one dimensional style of football has been found wanting many a time against physical teams on narrow pitches, and Barcelona were lucky to scrap through in the past and it has provided them a false sense of security.
What did you think Dortmund did best against Madrid when they faced them in the group stages? Will Madrid be able to adapt this time round?
With Xavi, Iniesta and Busquets all on the pitch, Javi Martinez outplayed all of them. Do you think Del Bosque would start considering him for one of the starting positions in the national side?
Will Götze start tonight? If he does start, will the crowd be hostile? Can Borussia Dortmund afford to leave him out from the starting 11?
Do you have any idea why Vilanova waited so long to make a change? Was there any underlying logic to that bizarre decision?
What gameplan do you expect from Real Madrid? Benzema started away against Dortmund in the group stages; are they looking to exploit the space behind Dortmund more with Higuain leading the line?
Is there anything strangely comforting about a team and tactical approach deemed all but unplayable less than two years ago seems to have been figured out?
How do Barça adapt now to get back on top? Neymar or a change of style?
They should not change their style. One of the things that happens every time Barcelona lose is that people say the whole system and idea is flawed. It is no more flawed than any system or idea. They need to make changes: stronger squad, perhaps a touch more variety, reimpose that physical competitive edge that also identified them. Their era is over if yo uunderstand era as their domination (and that's because of others too, partic Bayern and RM). But it is not over in terms of them being amongst the dominant teams. So long as they can make those small adjustments. Neymar will probably come, but I'm not entirely convinced that he is what they really need.
Malhar Bhadbhade asks:
What's your hunch on where Jose Mourinho will end up? And do you think Iker Casillas will play again this season?
Chelsea (or perhaps PSG but I think Chelsea .... if he finally takes that decision and says yes). Casillas? No.
AndAllThatCal asks: Do you think there is any chance that Madrid may approach Jupp Heynckes when Mourinho inevitably leaves this summer?
This is an issue that came up for the first time last night. It's an intriguing one but the answer is no really. Everyone suddenly loves him (he wasn't really that much of a hero despite the 7a) and the idea is attractive but Madrid will look towards Ancelotti if, as appears likely, Mourinho leaves.
Sid is online in the comments section below
Sid Lowe will be online from 12pm to answer your questions
Good morning. Sid Lowe will be online at 12pm.
In the meantime here is his take on last night's game: Barcelona's crushing blow at Bayern feels like a changing of the guard
If you have any questions, drop them into the comments section below.