Kylian Mbappe is already working under Christophe Galtier, the new PSG coach who, since he was unveiled, has been keen to emphasise that commitment to the club and the team will take precedence over individuality.
One of the most frequently mentioned comments on social media about the striker's first day back at work after his contract renewal, has been the physical change undergone by the World Cup winner.
The truth is that Kylian, especially in comparison to last summer, looks slimmer and less muscular.
One of the reasons for the change in the striker's look is that, despite his arrival last Monday, the player has been training since the Wednesday before, in order to return to his best physical condition.
He did so at Monaco's facilities after speaking to his former club, according to RMC, and underwent two-hour work sessions under the watchful eye of his father, Wilfrid Mbappe, who coached his son's first team at AS Bondy, where the international star was raised.
Not spared from the training sessions were Kylian's two brothers, Ethan, who is also at PSG, and his adopted brother Jires Kembo Ekoko.
According to RMC, the PSG striker also had time for lunch with Vadim Vasilyev, Monaco's former vice-president and a key man behind his arrival at PSG after the first battle between the Parisian club and Real Madrid for his signature in the summer of 2017.
Difficult months for Mbappe
It has not been an easy summer for Mbappe either, under enormous pressure regarding his future until he announced his final decision and renewed his contract with PSG.
The first thing the Frenchman did after signing his new dea was to take a well-deserved rest.
But he also fulfilled commitments for his IBKM (Inspired by Kylian Mbappe) Foundation in New York.
The player spent time with the children who receive the support from the World Cup winner and are his main priority outside of football.
Another reason for Mbappe's change could be to lose some muscle mass in order to regain more speed.
The Frenchman is already one of the fastest players in the world, and has a physique that makes him unstoppable, but he would not be the first to change his training regime in order to achieve the perfect balance of power and speed.