The 25-year-old joined City from Wolverhampton Wanderers in the summer of 2025 but has struggled to establish himself as a regular in Pep Guardiola's side.
Aït-Nouri has made 35 appearances for the club since arriving, contributing nine assists. However, his opportunities have been restricted this season, and he has yet to feature in the Premier League.
The Algeria international has previously been linked with Liverpool and Juventus, but interest from Italy is now gathering pace ahead of the January transfer window.
According to Sky Sport Switzerland, Juventus and Napoli have both included Aït-Nouri on their lists of potential targets and have been in contact with his representatives.
The defender is reportedly considering leaving Manchester City during the winter window, with a move away from the Etihad Stadium potentially offering him a clearer route to regular first-team football.
There is also a suggestion that Aït-Nouri could attempt to push for a departure in January. However, agreeing a deal with City may prove difficult, particularly if the Premier League champions insist on a permanent transfer.
The Italian clubs are reportedly concerned about meeting City's financial demands for the 25-year-old. A permanent deal could therefore be beyond their available budgets during the winter window.
A loan arrangement could provide an alternative. Juventus and Napoli are understood to be considering a temporary move with an option to buy, potentially becoming an obligation if certain conditions are met.
That structure would allow the Italian clubs to strengthen their left flank without immediately committing to the full transfer fee demanded by City.
For Aït-Nouri, the attraction would be the prospect of playing more regularly after finding opportunities limited in Manchester. His attacking qualities and ability to operate as an adventurous left-back have made him an attractive option for clubs seeking to improve their wide positions.
Manchester City would still need to agree to the terms of any proposed deal, and there is no confirmation that a transfer has been arranged. The club's valuation and preference for a permanent sale could determine whether either Italian side can make progress.
Aït-Nouri's future is therefore likely to remain a transfer issue to watch as the January window approaches, with Juventus and Napoli both reportedly interested in bringing the Algeria international to Serie A.