Yet the monumental task facing Celtic as they step out on to the Parkhead pitch to face Barcelona on Tuesday has an unsettling familiarity to it.
November 7, 2012, will go down as a landmark date for a team that knows its history, especially when it comes to European nights.
Victor Wanyama and Tony Watt etched their names into Celtic folklore as their goals brought the might of the Catalan giants crashing to the sodden turf on a stormy night in Glasgow in the Champions League.
Neil Lennon's charges are set to step unto the breach once more next week, hoping the spirit of last year's 2-1 triumph can be replicated.
Yet Spanish football expert Gerry Armstrong holds the belief their stunning victory, which sent shockwaves through Europe, holds the key to unlocking Tata Martino's side's defence again.
The two men who managed to achieve the feat last time around may not be at Lennon's disposal this time round - Wanyama is now at Southampton and Watt is on loan at Lierse - not to mention the loss of Gary Hooper and Kelvin Wilson.
But Northern Irish legend Armstrong reckons the same game plan should be followed by Celtic if they are to kickstart their Champions League campaign on Tuesday.
"There is only one way to approach this for Celtic and that is to go out with the same game plan they had this time last year," said the Sky Sports pundit.
"Barcelona still have those same vulnerabilities at the back. There are still openings there for goals to come.
"But the biggest challenge lies in trying to contain them.
"They have so much pace, fluency and creativity going forward that they can punish teams very quickly for any kind of lapse in concentration.
"Celtic worked their socks off last year when they played them, both in Glasgow and in the Nou Camp. You need that and you also need just that little bit of luck too.
"Can they do it again? Why not? It can be done. Barcelona were 3-0 up against Valencia a few weeks back and then let them back into the game when they lost two quick goals.
"The same happened against Seville at the Nou Camp when they were two goals up and won the game 3-2 when they scored the winner in the final minute."
He added: "From set-pieces, there are goals to be had against Barcelona, although I'd have to say their keeper, Victor Valdes, has been in exceptional form this season. He has pulled them out of a hole a few times but Celtic will get chances.
"They have to take them and they will have to burst a gut when Barcelona have the ball."
Armstrong still speaks to his fellow countryman Lennon and he has already told him to pick up the phone for the inside track on Barca.
"I met him a few weeks ago over here and we had a blether," he said. "But I have always told him he knows where to find me if he needs the low-down.
"The thing is, everyone knows what they're going to get when they play Barcelona. It's just how you try and set your stall up against one of the best teams in the world."
Celtic acquitted themselves well in their opening Champions League game against AC Milan in the San Siro but left empty-handed and cursing their luck.
Yet, for all that fortune was not on their side when it came to the goals they lost in the 2-0 loss, the game also highlighted the lack of a genuine penalty box striker.
Similarly, they faced a shock exit from the Scottish League Cup this week against lowly Morton, despite dominating the game and bombarding the SPFL Championship side's goal.
Such profligacy will be punished by a team with Barcelona's array of talent. Lionel Messi has already netted seven goals this season, while Brazilian Neymar has struck up a quick understanding with the Argentine.
"Neymar is very lightweight but he is like lightning with terrific feet and outstanding technique," said Armstrong.
"He is only 21 and there's no doubt he will be a superstar. Neymar and Messi have linked well together but there has been some whispers Neymar might be carrying a knock.
"Even so, there is quality all over the pitch. Not much has been said about Xavi and Iniesta this season because Messi and Neymar have really stolen then headlines, but they have been consistently excellent.
"And the one guy who is in there and pulling the strings is Cesc Fabregas.
"He is playing some of the best football of his career just now but the bottom line is that middle to front Barcelona are just formidable.
"There isn't a weakness there. If Celtic are to do anything, their best work will probably have to be done off the ball as they work on restricting Barca.
"But should they find things opening up for them at the back then need to be able to take those chances.
"They have brought in a few new players and it does take time for a team to settle when there are key players who have gone and others who have come in. But if they're not fully switched on for Tuesday's game they'll find it a long night."