Our Scottish football correspondent was online to answer your questions about tonight's match at Celtic Park
Thanks for reading and commenting.
We have plenty of other Champions League stories on the football site today. Here isJonathan Wilsonon Shakhtar Donetsk v Manchester United, Amy Lawrence on Arsenal v Napoli and, er, a story about a new burger made in honour of Zlatan Ibrahimovic.
Thanks for the work in defending Scottish football against the dark forces of AC Jimbo and his crew...
1) Looking past the game tonight, do you think Lennon has progressed this team in terms of breaking the away-game hoodoo? The away games in Elfsborg and Karagandy were both influenced by the pitch... and Celtic were the better team for much of the Milan game. He seems to have done more than any of his predecessors in terms of breaking the cycle.
2) Speaking of the Milan game - any idea why Celtic have struggled so much against Italians in recent years? They just pick us off, even when we match them in open play.
Do you think it's crucial Celtic score first?
Celtic's performance in the San Siro was encouraging because they played a more possession-based game but still eventually lost. Do you think Lennon has given away some of that defensive steel that helped them reach the knockout stages last year, for a more attractive way to play in Europe?
Was Barça's purchase of Neymar motivated more by commercial than footballing considerations? It strikes me that the last area they needed to strengthen was middle to front and that their persistent defensive vulnerability gives Celtic a chance and, more than anything, will ensure that they don't win the Champions League.
What will Neymar think when faced with the cold dead eyes of Scott Brown? In seriousness though, how important do you feel players like Brown, who while lacking in technique and skills are willing to lead by example and get "stuck in", are in these sort of games?
Having lost to Milan away, is it fair to say Celtic need three home wins to have a decent chance of qualifying for the next round? I realise expecting them to beat Barcelona is excessive, but is it not more plausible than getting three points at Ajax, especially given last season's result?
Given the dearth of successful British managers, due in some part to a lack of opportunities, how do you think Neil Lennon would fair with a good side south of the border, one with potential for Europe?
Is Scott Brown the most useless midfield "enforcer" ever? In that he can't tackle or intimidate opponents – not that he can pass, score or dribble either. If Celtic ditched him and played Ledley, Mulgrew and Biton in centre they may actually get some decent possession going!
Do you think Lennon could use effectively four full-backs by starting Izaguirre, Mulgrew, Lustig and Matthews to "double up" the threat from Alves/Adriano (Alba still injured?) and to maybe catch Barça out on the break with pace down the flanks and whipping crosses in for Samaras (who I imagine will play as a lone striker)?
What is Barcelona's starting lineup likely to be? Will Neymar be an adequate replacement for Messi?
Neil Lennon's tactical acumen OR Celtic's rabid support: what is the most important factor in the home team's fine record at Parkhead?
What's the score going to be?
If you could ask yourself one question for a live webchat about Celtic's match against Barcelona tonight in the Champions League, what would it be and what would be your answer?
Do you see Barcelona progressing to the final this year? Do you think Tata Martino has resolved their squad/tactical issues to make them competitive against Bayern Munich?
What does this game say about the state of Scottish football? A few years ago talk of Celtic losing at home to Barcelona would have been ludicrous.
Is there any way Celtic can avoid defeat without parking the bus and hoofing the ball to Samaras? Do you think an aggressive approach can catch Barcelona off-guard?
Will Rod Stewart cry again?
Good afternoon. Ewan will be here soon to take questions about tonight's match at Celtic Park. In the meantime, here is his take on the task facing Celtic against the La Liga leaders:
The notion of playing a plucky loser has never sat kindly with Neil Lennon. Even with Celtic part of an illustrious Champions League group, one filled with former winners of various forms of the European Cup for the first time, Lennon has challenged his players to progress to the knockout stage for what would be a second season in succession.
Amid the plaudits dished out to Lennon and his players for their performance in defeat to Milan at the San Siro, a counterpoint will not have escaped the attention of the Celtic manager. That is: long periods of positive play, especially at the top level, counts for nothing without the ruthless streak to go with it. Lennon is clearly an astute enough coach and experienced enough in football to recognise that.
For all that Celtic troubled a Milan side that will not rank among the great ones to don red and black, a lack of conviction in front of goal undermined their efforts. Celtic suffered due to exactly the same shortcoming that hindered them when they faced different Italian opponents, Juventus, in the knockout phase of last season's Champions League. Continue reading
If you have any questions for Ewan, drop them into the comments section below.