The 23-year-old has turned down repeat overtures from the Ligue 1 champions to extend a contract that expires in 2019. This has caused sustained links to Barcelona and Juventus.
However, the Italians giants are prepared to play a waiting game.
The Serie A champions have repeatedly shown themselves to be experts in working the free-agency market. Germany midfielder Emre Can became the latest bargain recruit this summer after his contract at Liverpool was run down.
Liverpool have also expressed interest in the former Pau man.
