With Paris Saint-Germain struggling to convince during the opening stages of their Champions League campaign, questions will be asked.
Given the French giants' history in the competition, their huge expenditure and an aggressive summer recruitment drive that brought the likes of Sergio Ramos and Lionel Messi to the club, the pressure is on Mauricio Pochettino.
Indeed, while there can be no doubts as to their vast array of quality, how the team will fit as a collective unit remains to be seen. On paper, Messi, Neymar and Kylian Mbappe is the stuff of dreams but, in reality, it may not work as a front three considering their lack of defensive work.
For Messi and Neymar, time is running out to add to their Champions League stories. The former, of course, has lifted the most coveted trophy in the game on four occasions, while the latter only once.
For Mbappe, however, things are different.
Though a seasoned vet at this level, the 22-year-old still has so many chapters left to write. Whether it be in the French or Spanish capital, Mbappe seems destined for more chances to win the ultimate prize at club level.
Should PSG impress against Manchester City - the team who knocked them out at the semi-final stage last time out - then perhaps the superstar trio can put their mark on this season's edition.
Mbappe, of course, has already ripped City apart.
The Frenchman, 18 at the time and labeled the 'new Thierry Henry', formed part of the Monaco side who drew 6-6 on aggregate with Pep Guardiola's team, turning the tie around with a 3-1 win in the second leg at the Stade Louis II.
While the striker was starting to emerge as one of the most promising talents in world football but, for the average football fan, remained somewhat of an unknown.
Until the first leg at the Etihad Stadium.
Lining up alongside Radamel Falcao, Mbappe tore a one-paced City team apart on the counter, constantly dragging defenders out of position. Driving at the heart of the home team's defence, he was a constant thorn in their side.
Not only did he set-up Falcao to level the scores (in what turned out to be a 5-3 City win) but Mbappe showed how clinical he would become by getting behind his markers and finishing emphatically.
In the second leg, it would be Mbappe who put City to the sword and knock Guardiola out at the quarter-final stage for the first-ever time.
Against Manchester City, Kylian Mbappe made his name in the Champions League.
Not long after, the Premier League giants tried to sign the player although Mbappe wanted to stay in France at the time.
With his contract up until 2022, perhaps the two could be reunited.