WHEN that Champions League tune rings out inside Celtic Park tomorrow night and 60,000 punters are screaming their hearts out, the apprehension that may have filled some of the players and fans when the draw was made will be replaced by an injection of belief that will be coursing through the Celtic players' veins.

Yes, they have been dropped into a group containing two huge European juggernauts in PSG and Bayern Munich, not to mention a very decent Anderlecht side who will certainly be no mugs but, in that type of frenzied atmosphere with those fanatical fans urging them on, anything is possible.

Juventus, Barcelona, AC Milan and Manchester United have all been beaten at home when no-one gave Celtic a prayer. If there is such a thing as a 12th man, then Celtic will have it.

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I was lucky enough to play at Parkhead many times, even scoring a hat-trick on one occasion (albeit, one goal was ruled offside by a linesman with cataracts), and always enjoyed going into that type of intimidating arena. In saying that, having been in the stand on a Champions League night, it was a completely different noise.

The hairs on the back of your neck truly do stand up. I saw at close quarters decent Celtic players transformed, and players who seemed to grow an extra lung and find a yard of pace from nowhere in that intoxicating atmosphere. I also saw top-class players look hurried and flustered under that kind of intense pressure. The Celtic lads will need to find that extra bounce again tomorrow against an expensively assembled PSG outfit packed with outstanding talent, pace and power.

Just looking at the type of money the French giants have been able to spend this summer, it really should be a complete mismatch. An astonishing amount of £350m has been spent on just two players. That kind of money is in a different stratosphere to the likes of Celtic.

Neymar, who incidentally will be in for a red-hot reception from the fans after his run in with Scott Brown back in 2013, is world-class, his ability on the ball is unquestionable. Finally free from the shadow of Lionel Messi, he will be looking at being not only finally the best player in his own team, but in world football.

Kylian Mbappe was probably the hottest prospect in Europe after a fantastic season with Monaco and alongside the aforementioned Neymar and Edison Cavani, it will take a monumental effort by Celtic defensively to keep 'Les Trois Mousquetaires' at bay.

Ominously, they have started the domestic campaign in flying form with five wins from five and scoring 19 goals in the process. It really is a huge task Celtic are faced with but I am convinced at the other end Celtic have the players to cause them problems. In fact, it may even be one of their own players who comes back to haunt them.

Odsonne Edouard certainly made a very impressive debut for Celtic at Hamilton Accies on Friday and looked a player of great promise. Under UEFA regulations the young Frenchman, like Patrick Roberts last season against Manchester City, is eligible to play against his parent club. I know there may be just a little bit of a gap between PSG and the bold Accies but his movement and blinding pace certainly caught the eye on the night.

It may even be with injury doubts continuing to surround Moussa Dembele and Leigh Griffiths that he gets the nod to start as the lone striker. Celtic will hope that either Griffiths or Dembele are fit to start as they are proven at that level, but even if Edouard is on the bench, his pace late in the game if Celtic are still in contention could be a massive asset. With Scott Sinclair now in flying form, the return of the fantastically talented Roberts and Armstrong back to his best, bursting from midfield, Celtic can hurt PSG going forward. But it's at the back that gives greater cause for concern.

Celtic's failure to bring in another proven centre back in the transfer window could very well be exposed tomorrow night and in the Champion's League in general. Playing the likes of Nir Bitton and the promising but raw Kristoffer Ajer at centre back domestically is all well and good as Celtic will have probably 60-70% possession most weeks and be put under minimal pressure. But when you are under the cosh and defending for your lives at the elite level it is a totally different ball game.

It seems Brendan Rodgers remains unconvinced by the injured Eric Sviatchenko with rumours persisting about the Dane's future at Celtic. With Dedryk Boyata still out injured, Jose Simunovic will hopefully come out of Friday's game unscathed but just who will partner him at centre back remains to be seen. Whoever is tasked with holding the fort at the back will need to have the game of their lives along with the rest of their team mates to turn over the French giants.

Rodgers recently referred to PSG as a team of "11 motorbikes". With the help of 60,000 fans inside the cauldron that is Parkhead, maybe together Celtic can play above themselves and puncture the Parisian Galacticos. Either that or crash helmets could be the order of the day.