Il Corriere dello Sport says while the two clubs haggle over his fee, Sancho has approved the move by agreeing contract terms with the Bianconeri.
Sancho has reached an agreement on a five-year contract worth €6m net plus bonuses, until 2030. This is a significant gesture, considering the €10m he currently earns in Manchester.
The England international has realised that his time at United is coming to an end, after two years on loan and being excluded from the summer tour.
United have been asking for €25m to release him a year before his contract expires, but Juve have settled on a price between €18-19m.
Sancho is also seeking a severance package, which the Red Devils do not intend to grant. However, the Bianconeri could cover this sum in the form of a signing bonus.
Sancho's camp are pressuring United to relent on their asking price given the sacrifice the player is making to see the deal through.