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Aman Hassen asks:
Is Diego Costa playing?
Guardian staff Unless something has happened overnight, Mourinho said Costa would play.
He wasn't entirely sure though whether Costa will be at his best and I think that's a valid point. A little break is always good for a player, but Costa has been out for three weeks. They arranged a training-ground match against some of the youth-team players to try to improve his sharpness but it's still not the same thing as playing properly.
Ronaldinhos_smile asks:
Whenever I’ve seen Lavezzi he has been really good – direct running and scaring defenders. Where would you rate him among Europe’s best attackers?
Guardian staff He's always impressed me too. It's strange sometimes how some players get all the attention and others don't so much. Maybe he is in the shadow of Ibrahimovic and Cavani that way, but he is dangerous - quick, direct, always wants the ball. A friend of mine on L'Equipe regards him as PSG's best chance in this tie.
DennisFranz asks:
Who is your pick for the trophy?
Guardian staff
DennisFranz asks:
Do you think the absence of Manchester United, one of the top five clubs in world football, has harmed the competition this season?
Guardian staff Not at all. You've got to be good enough to qualify and the simple fact is that MUFC weren't even good enough to get in the Europa League last season.
If they were playing scintillating football then it might be slightly different but they aren't - and quite often the opposite. I've rarely seen them play above six out of ten this season.
ZapataSD asks:
Who is more likely to start between Cech and Courtois? I think Cech warrants the start based on recent form.
Guardian staff Such a difficult one. I would maybe lean towards Courtois simply because he is officially the No 1 now.
I was at the game against Aston Villa, though, and he did look unusually vulnerable, and maybe feeling the effects of his first season in the Premier League.
Mourinho made that point after he left him out against Everton - that it wasn't necessarily physical fatigue but the mental part of it. It wasn't a big thing at Villa but there were a few imperfections (coming for crosses a couple of times and not getting there). Obviously, there was the mistake against Man City too so it was a good time for Mourinho to give him a break and Cech obviously made that brilliant save to keep out Romelu Lukaku in the Everton game.
Whoever it is, Chelsea know they have a great goalkeeper playing for them.
Tom Seymour asks:
Was the sale of David Luiz to PSG a purely brilliant piece of business? Or might PSG have paid the going rate for a truly great footballer?
Guardian staff Maybe a bit of both. It's great business because Mourinho doesn't want central defenders who take risks, leave their positions, play the game as though it is fun. David Luiz was never going to be his ideal partner for John Terry so, on that basis, £50m is an incredible fee.
Equally, I don't really buy into the general mocking of David Luiz. Yes, he lost the plot that night last summer when Brazil played Germany (along with just about every one of Scolari's players). It's difficult to forget that meltdown and it will probably always be used against him. Yet, before then, he had probably been the best centre-back in the competition - and everyone seems to forget that. He isn't the joke a lot of people make out.
SolidSid “asks”:
If Fabregas plays, it will dictate the result
Guardian staff I think he will be OK. He trained yesterday, albeit wrapped up, and if he was feverish etc I doubt Chelsea would have let him on the plane and risk others catching it.
cavelier5 asks:
Is it true that Laurent Blanc has to at least get to the final of the Champions League to keep his job? From what I’ve seen of PSG they tend to coast through many league games, so all of a sudden having to up the intensity against a battle hardened unit like Chelsea isn’t going to be easy.
Guardian staff I couldn't be sure about his job - only that it stands to reason that a club with PSG's ambitions don't want to be standing still and if they go out in the first knockout stage it will inevitably be seen as a failure. After that, the super-rich in football don't generally show great patience, do they? But that is only supposition.
hamiltonricardo asks:
Controversial question: is Zlatan overrated? I say this in the context of his relatively weak Champions League record. Yes, I’m sure you can quote some impressive goalscoring statistics at me but I have no strong memories of Zlatan ever influencing games at the latter stages. There’s nothing wrong with being a show pony, albeit the most showiest and talented of ponies, but I always feel like there’s a bit of substance missing that’s preventing him for joining the likes of Messi, Ronaldo, Zidane, Pirlo etc. who have made such an indelible mark on this tournament. Yes, we all like a good meme, some of the things he says are funny and he will go down as one of football’s most memorable personalities but do we honestly think we’re dealing with an all-time great here?
Guardian staff I've made that mistake before, as have others, and learned over the years that if you under-estimate him it can come back to bite you.
It's true though that he has played many big games and disappointed but, equally, I've also seen him destroy opponents. Would he be in my top ten of world superstars? Probably not. An all-time great? No again. But he is still a genuine, category-A superstar.
Maybe he can be both: brilliant and over-rated.
I know it was only a friendly but that performance against England in Stockholm was something else as well. He played football that night like it was a computer game.
jb1905 asks:
How confident are the Parisians about their chances tonight?
Guardian staff Laurent Blanc described what happened at the weekend as a "catastrophe". It wasn't really the correct word, but you know what he was getting at.
Yesterday he was wondering whether his team can make the most of all the "negative conditions" and actually draw on the fact they have lost key players, the siege mentality and all that. That's easier said than done but they do still have Ibrahimovic, Lavezzi and others.
The French journalists I know aren't particularly confident though. Yes, France Football currently has a cover showing Mourinho and the headline “L’Emmerdeur” - the Shit Stirrer - but there is also a line in the editorial that caught my eye. "He makes your fingers tremble just writing his name." That's a pretty big compliment once we get past the initial insult.
NERVSEELE asks:
Does Daniel Taylor fear Branislav Ivanovic?
Guardian staff
mjd113 asks:
How many players playing tonight have come through the ranks at that club? And is this the rather sad proof that the Champions League is won by those with the deepest pockets and nothing else?
Guardian staff Just the nature of the football business. Is it sad? To a degree. But it isn't always the case. The best club side I've ever seen, Guardiola's Barcelona, had plenty of their own players.
And we’re off...
TyrannoSuarezRex asks:
Is this tie as one-sided as it looks?
Guardian staff I know what you mean. I was at the PSG press conference and - OK, sometimes too much can be read into these things but it wasn't a very positive vibe, to say the least.
There are the injuries, of course. But little things as well. David Luiz was asked at one point to compare Mourinho and Blanc and made an awkward little joke about them "both ugly" without so much as a flicker of a smile from Blanc, sitting to his right.
We also saw Blanc give Ibrahimovic a public dressing-down for his show of tattoos at the weekend - saying it was a good cause (to show there are hungry people in the world) but not when it means getting a yellow card two minutes into a match.
David Luiz was talking about the PSG crowd being "asleep" recently. Maybe the crowd could say the same about the team on occasions. Altogether, it does make Chelsea look in decent shape.
Mourinho effectively scapegoated Fernando Torres after the 3-1 defeat here last season, saying Chelsea had no "real strikers". This time he has Diego Costa and Chelsea just look a lot more rounded team.
Updated
Danny will be online from 12.30pm GMT to answer your questions
In the meantime, here are this week’s Champions League fixtures and some of our previews:
Paris Saint-Germain v Chelsea
Shaktar Donetsk v Bayern Munich
Basel v Porto
Schalke v Real Madrid
PSG hobbled by injury and complacency before Chelsea tie
French champions have suffered ruinous build-up to Champions League last-16 first leg in a season of relative under-performance
José Mourinho stirs PSG passions before tackling club he rejected
The latest France Football has a picture of José Mourinho on the cover and a headline of “L’Emmerdeur” that, to be kind, is a way of describing the Chelsea manager as a pain in the neck. In a more literal translation – and the compliment is repeated inside in the form of “l’emmerdeur professionnel” – the most respected football magazine in France has just renamed the Special One as “the Shit Stirrer”.
José Mourinho to unleash Diego Costa despite sharpness fears
José Mourinho fears Diego Costa has been blunted by a recent domestic three-match ban, as he prepares to throw the forward straight back into the fray against Paris Saint-Germain.
Diego Costa interview: ‘Football is my life’
Diego Costa talks about his ban for stamping, Cesc Fàbregas’s ‘gift’ for passing and putting money into his academy in Brazil to ensure kids get a chance in life
Drop your questions into the comments section below
Updated
OK . . thanks for the questions everyone. I'm off for a late fitness test as I appear to have a few of Fabregas's germs.
Fancy Chelsea tonight, maybe 0-2