Neymar, Mbappe, Cavani (2), & Lustig OG for PSG
Celtic have never won their opening group stage match
PSG have never lost in Scotland
Bayern Munich beat Anderlecht 3-0 in other Group B match
Next up for Celtic in the Champions League is away to Anderlecht, which they would have earmarked as their best chance to take points away from home.
Next up for us is a return to the Scottish Premiership on Friday, when there is a Glasgow derby to look forward to - Partick Thistle entertain Rangers at what they have, wait for it, catchily renamed "The Energy Check Stadium at Firhill".
FT: Celtic 0-5 Paris St-Germain
Celtic's heaviest home defeat in European competition leaves Brendan Rodgers' side bottom of Champions League Group B.
It is only one game into a six-match campaign, but is Rodgers paying for not signing a central defender to cover for the injured Dedryck Boyata and Erik Sviatchenko?
The manager himself has just compared their defending in the first half to that of "under-12s".
However, Unai Emery is putting together not only the most expensive squad in the world but potentially the best team too.
It is early days. Celtic recovered from losing 7-0 to Barcelona last season and they will have to do something similar this time too.
Image source, SNSFT: Celtic 0-5 Paris St-Germain
Tom English
Chief sports writer, BBC Scotland
Quote MessageThere is a kind of shocked acceptance on the part of Celtic fans. Celtic fans feared the worst and it was even worse than they thought. But PSG are a ridiculously good side who played ridiculously well tonight
FT: Celtic 0-5 Paris St-Germain
Paris St-Germain coach Unai Emery: "The most difficult thing here is to cope with the rhythm Celtic play at and the intensity they play with and, of course, the support they have with them.
"I think my team showed a lot of character. It was really a team effort and it showed a really controlled approach to the game, which I'm very pleased with.
"I thought we had a lot of threat in the midfield. We controlled not just in the midfield but all across the park.
"What I was really pleased with was that we were in control with the ball but also without the ball."
Image source, SNSFT: Celtic 0-5 Paris St-Germain
The stats kind of speak for themselves - PSG dominant yet also clinical.
Image source, BBC Sport#bbcsportscot and https://www.facebook.com/bbcsportscotland
Andru Blakk, external That result, though completely embarrassing, hasn't really changed anything. We were always going to be fighting for third with Anderlecht and that's still the case.
Arnie Frank Meikle, external Good job PSG stopped trying in the second half!
Jamie Garden, external 5 going on 50
Ellen Fagan, external Ouch!
FT: Celtic 0-5 Paris St-Germain
Richard Gordon
BBC Sport Scotland
Quote MessageCeltic have been 'Celtic-ed' tonight. They are used to thumping teams in domestic competitions who have budgets a fraction of theirs. The reverse has been the case tonight
FT: Celtic 0-5 Paris St-Germain
Owen Coyle
Former Bolton manager on BBC Radio Scotland
Quote MessagePSG's middle three, their ball retention, their awareness of where each other were, the little triangles, and then, once they had opened up the space, to find Neymar or Mbappe, was great. A total understanding of how to play in a team structure
Tom English
Chief sports writer, BBC Scotland
You can now read Tom English waxing lyrical about PSG's win over Celtic.
Quote MessagePSG - 69% possession, 10 shots, six on target
Celtic sustain their heaviest ever home European defeat as Neymar leads the way for Paris St-Germain in the Champions League group stage opener.
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Paul McCluskey, external PSG are miles ahead of the majority of Europe. Never mind Scotland!
Colin Hunter, external PSG great team passed with purpose. ..the new Barca.
Ronan Boyle, external Best Champions League team I've ever seen at Parkhead.
John Robson, external Hardly a level playing field though. Celtic are a small fish when it comes to Europe.
Grant Forrest, external Money talks
Celtic 0-5 Paris St-Germain
Speaking to BT Sport, Celtic manager Brendan Rodgers said: "We could've been better in the first half. We were too passive.
"We started the second half and I know it's easier to play when you're 3-0 down, but we were much better.
"I was proud of the players in that second half as they continued to work.
"We spoke at half time and were much better in the second half.
"You have to give them credit, they have shown why they will be up there with a great chance of winning this competition.
"It was a harsh lesson and a tough lesson."
Image source, SNSCeltic midfielder Olivier Ntcham and Brendan Rodgers were left disappointed
FT: Celtic 0-5 Paris St-Germain
Tom English
Chief sports writer, BBC Scotland
Quote MessageThe fan who ran on has put his club in a lot of trouble. Uefa is going to climb into Celtic for this. In fairness to the Celtic fans, they were booing him - they know what is coming now
FT: Celtic 0-5 Paris St-Germain
Richard Gordon
BBC Sport Scotland
Quote MessageWhen you think of all the success Brendan Rodgers has brought to this club and the great invincible run, he has been in charge of the two worst results in Celtic's history - 7-0 away at Barcelona and 5-0 tonight
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Douglas Bell, external No shame in losing to such a fantastic team. I had hoped Celtic could replicate previous European performances, but unfortunately the difference tonight was clear. Still, it's only match day 1.
Elwood Jackson, external Neymar may be class with the ball at his feet but showed no class in refusing to shake young Ralston's hand.
Barry McGloan, external Out played everywhere on the park. Basically like Celtic v Buckie Thistle in regards to player expenditure. The PSG fans deserve a round of applause. They were excellent start to finish.
FT: Celtic 0-5 Paris St-Germain
Anthony Ralston, making his Champions League group-stage debut at the age of 18, had a running battle with Neymar all night.
PSG's Brazilian superstar slipped his marker for the opening goal and had the young man in his pocket for the rest of the game.
Image source, SNSNeymar made sure Anthony Ralston knew the scoreline
Image source, SNSCeltic's Anthony Ralston was blown a kiss by Neymar
Right-back Ralston's only response was to kick out at opponents and was lucky to only receive one yellow card.
It looked like Neymar even refused to shake hands at the final whistle, gesturing the scoreline at the young Scot, who will surely have learned a harsh lesson at this level of football.
Celtic 0-5 Paris St-Germain
Speaking to BT Sports, PSG's Julian Draxler said: "The first half, we did a great job, which makes the second half much easier.
"It was important to get the first three points and, of course, the teams know we are good.
"It was a good start, not more, not less.
"We are happy for the moment, but we know we have to improve."
FT: Celtic 0-5 Paris St-Germain
Tom English
Chief sports writer, BBC Scotland
Quote MessageYou want the Scottish team to do well, but you have to look at that and say 'that was really beautiful football' . It was lovely to see that from PSG
Celtic 0-5 Paris St-Germain
Speaking to BT Sports, Celtic captain Scott Brown said: "First half, we were disappointing, but second half we were a bit better.
"The second half we kept possession a lot more, the first half just wasn't us.
"We are disappointed with the result, but they are a great team.
"We'll pick ourselves up without a problem."
Image source, SNSCeltic's Mikael Lustig and Scott Brown were left despondent
FT: Celtic 0-5 Paris St-Germain
Owen Coyle
Former Bolton manager on BBC Radio Scotland
Quote MessageYou hoped Celtic could pull off a mammoth result. It's not transpired tonight, but the competition is going to be between Anderlecht and Celtic for third place and hopefully that can be achieved
FT: Celtic 0-5 Paris St-Germain
Tom English
Chief sports writer, BBC Scotland
Quote MessagePSG have been doing this to teams this season. With those three upfront and the artillery they have got behind, I thought this could happen. Celtic have got to rationalise it and move on. They learnt their lesson last season against Barcelona