The wantaway Brazilian made his intentions known upon returning to first-team duties with the Ligue 1 holders, according to a report from ESPN FC's Julien Laurens and Jonathan Johnson.
The Sao Paulo-born juggler is just two years removed from a record-smashing €222-million switch from the Camp Nou to the Parc des Princes.
The oft-injured talent was expected to return to first-team activities last Monday, prompting PSG to announce that "the club regrets this situation and will, therefore, take appropriate action."
Barcelona have yet to table a formal offer for Neymar, and after splashing a combined €200 million on Antoine Griezmann and Frenkie de Jong, it's likely the Catalan side would need to send a package of players in return to abide by Financial Fair Play regulations. Griezmann's arrival has led to speculation of potential exits for Philippe Coutinho and Malcom.