But it hasn't been plain sailing.
That world-record transfer was followed by a deal for Monaco striker Mbappé, who moved to Parc des Princes on a season-long loan deal and will join on a permanent basis for a reported fee of €180m this year.
In an interview with L'Equipe magazine, PSG midfielder Adrien Rabiot has admitted that Neymar and Mbappé are afforded 'privileges', but insisted that it doesn't bother him and that Neymar is not a negative influence on the dressing room. "Kylian does, too", said Rabiot.
"When he is like that, it's good for the whole team and it allows us to win a few games in a row". I'm not jealous of either.
PSG beat Toulouse 1-0 on Saturday, the Ligue 1 leaders claiming victory as Neymar returned to action after sitting out the midweek Coupe de France win over Sochaux and scored the game's only goal.
"The Champions League is a competition that they do well in and we will see how it ends, because everything changes very quickly in football".
Rabiot says the pair enjoy a certain star treatment at the club but he insists he has no reason to be envious.
PSG travel to Real Madrid on Wednesday for the first leg of their Champions League knockout tie and, given the contrasting form of both sides, the visitors are probably slight favourites to proceed to the quarter finals.
The win sees PSG's move 13 points clear at the top of the Ligue 1 table, while Toulouse sit just one point above the drop zone in 15th position.