While the speed at which Mbappé, Neymar and Edinson Cavani have struck up an understanding is impressive, question marks remain about the goalkeeper, the left-back position and whether the Parisians have enough depth in midfield.
It was a real statement of intent from this summer's big spenders who signed Brazilian Neymar and teenage sensation Mbappe in a bid to make a real impression on the competition.
After four consecutive seasons of reaching the quarter-finals, PSG fell at the round of 16 last season when they capitulated against Barcelona after winning the first leg 4-0.
It was a result that convinced their Qatari owners to break the world transfer record to bring Neymar to the French capital.
"Before you knew it, a group of stewards got to him and took him off the pitch".
And Ben Woodburn, Liverpool's prodigious 17-year-old forward, also has the potential to make a huge impact on the Champions League stage, if not this season, then in the future.
"I think my team showed a lot of character".
"First half, we were disappointing, but second half we were a bit better".
European nights at Celtic Park are commonly regarded as special, with Bayern Munich defender Mats Hummels remarking earlier this week how he couldn't wait to play at the ground.
"I would like to emphasise that the security measures, which includes the presence of armed officers, are not in response to any particular threat as there is no intelligence to suggest that - similar measures have been introduced across a number of stadiums and are being used at Ibrox and Hampden".
"And I genuinely believe they can have success by getting crosses into the box".
Across town, at Manchester United, Marcus Rashford is another who has all the credentials to become a footballing superstar.
The Hoops have been drawn in a tough group. The man was quickly caught by 'stewards' of Celtic Park, who withdrew from field of play.
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