Lionel Messi scored a vintage goal as he opened his account in PSG's 2-0 win over Manchester City.
The Argentine had been yet to score for the Parisians so his second-half strike was certainly timely.
Idrissa Gueye had given the French team an early lead as he smashed home from close range.
City are in the midst of a horror week that features three unwanted away days, but will take heart from the performance.
They won here a matter of months ago in the semi-finals of this competition but could not repeat the feat.
Pep Guardiola's side enjoyed large periods of dominance but were unable to truly cut open the PSG defence, who largely restricted them to half chances.
Raheem Sterling and Bernardo Silva especially both missed opportunities.
Here are five talking points from the French capital.
1 Messi makes his mark
The Argentine star could well have ended up at either of these clubs, as it is the Parisians will be enjoying him for the next two years, at least.
On paper he forms a fearsome front three that again featured on Tuesday night.
Messi was yet to score for his new employers, but he changed that against the man who has had perhaps the greatest influence on his career.
It was as if he rolled back the years, something Guardiola knew was possible as he spoke post match.
Messi jinked his way into the City half before playing a 1-2 and finishing past Ederson. The first of many you'd presume.
2 A high quality affair
Rarely does anyone give City as good as they get but PSG certainly did so.
Both clubs share so many similarities and even their coaches tend to sing from the same hymn sheet.
Mauricio Pochettino is finally beginning to get his ideas across and their confidence in possession was a major plus as they took on the City press.
The Premier League champions certainly enjoyed their moments, as they always do, but couldn't manufacture that one clear cut chance that they desperately wanted.
Both these teams, given their investment, are expected to challenge in the latter stages of this competition.
City and PSG both showed they have the tools to win the Champions League this year and no one who wanted to see the best make the final would be upset to see these two in St Petersburg come May.
3 The one you least expect
Gueye will certainly have ruined a fair share of first goalscorer bets this evening as he powered home in Paris.
The Frenchman riffled home with the confidence of a seasoned forward, not that PSG will be complaining.
With Messi, Neymar and Mbappe all on the pitch Gueye's role was to break up the City attacks and feed his forwards.
Instead he found himself in the box and firing into the top corner, leaving Ederson rooted to the spot and netting the all important opening goal.
Who will win this season's Champions League? Have your say in the comments.
4 How did he miss?
Bernardo will not want to look at his first-half chance again.
It could yet make an unwanted highlight reel come the end of the season. The term "it was harder to miss than to score" is overused, but in this instance it is particularly apt.
With City trailing in the first-half Sterling's header came off the bar but dropped to the Portuguese midfielder no more than two yards out.
His side footed effort though was quick to rise and struck the bar before his attempts to bundle home the rebound were thwarted.
He turned around and appealed, perhaps for a penalty that might have just spared his blushes.
5 Relentless schedule
Chelsea and then Paris now breathe - or not.
City's epic eight days sees them now gear up for a trip to Anfield on Sunday.
Pep Guardiola's side won at Liverpool for the first time since 2003 when they beat the Reds 4-1 earlier this year.
However that was without the crowd in attendance and Anfield will present a very different challenge this Sunday.
City won their Champions League opener against RB Leipzig so defeat in the Parc des Princes is by no means the end of the world after two games.
