The 24-year-old has been with Les Parisiens since 2012 and has played a key role in their run of four straight Ligue 1 titles.
His ability on the ball has seen him regularly linked with a move away from the Parc des Princes, with Juventus believed to be keen, while a reunion with former Italy boss Antonio Conte at Chelsea has also been mooted.
Current Azzurri coach Ventura has suggested he would like to see the playmaker feature for a club in what he perceives to be a more competitive league.
With PSG so dominant, the boss believes the former Pescara man is not being tested regularly, and as a result, could be viewed as being under-prepared when it comes to international selection.
"The problem is that he doesn't play in Italy, but in France," Ventura said. "The rhythms are different; the strength of his team is so high that he never gets put in difficulty.
"He must get used to putting 100 per cent into matches."