Tuttosport says with the Frenchman having just one year remaining on his contract, hopes of a reunion are growing in Turin.
Juventus cannot afford the sort of transfer fee that the Red Devils would demand for their No6.
So a swap deal could be most feasible for both parties.
Ronaldo's agent Jorge Mendes has been in Italy for meetings this week, with the 36-year-old's future on the agenda.
The Portuguese remains a prolific goalscorer for the Old Lady.
But Juve are struggling to afford his enormous wages.
Parting with him could therefore be beneficial, especially if attaining Pogba in the process.