The Englishman has bagged four goals and five assists on loan with the Blues this campaign, but he is expected to return to Old Trafford when the season concludes.
The Blues have an obligation to buy him for around £25 million, but the London giants are set to cancel the agreement by paying a penalty fee of around £5m.
Sancho could be offloaded immediately by the Red Devils and reports in Turkey claim that Galatasaray are weighing up a serious approach for the attacker.
The 25-year-old has his sights on leaving the Red Devils. The club share the same opinion and it is only a matter of time before he leaves on a permanent deal.
United are ready to accept less than £20m for his services such that interested clubs can pay close to his weekly wages of £250,000 after his transfer.