They have had further talks with Borussia Dortmund and after seeing a £ 67million opening bid turned down they are very confident to cross the line.
Sancho, 21, is set to leave Dortmund this summer and return to England after graduating from Manchester City Youth Academy.
England star Sancho is part of Gareth Southgate’s 26-man squad for the Euro but was not on the matchday list for the group’s opener with Croatia.
However, Sancho expects his move to Old Trafford to continue, which could also mean Dortmund can hang on to star striker Erling Haaland this summer, having qualified for the Champions League.
Dortmund are believed to want the majority of the money up front for Sancho with a number of add-ons included in the deal.
Sancho tentatively agreed to terms with United last summer, which should make this part of the transfer a fairly straightforward task.
The right-wing position is one that Ole Gunnar Solskjaer has been keen to strengthen since his appointment to Old Trafford and he is finally keen to add Sancho to his squad to launch a title offer next season.
Sancho also received the seal of approval from legendary former United boss Sir Alex Ferguson.
Speaking on SportBild this week, Ferguson said: “I think about Jadon Sancho a lot, with his one-on-one duels, as an assistant and a goalscorer he is extremely dangerous.
“He has so much potential, he helps the team. This is why he will be invaluable for England during the tournament [Euro 2020]. »
Dortmund are keen to make a deal by the end of July before the Bundesliga season starts on August 13, giving them plenty of time to find a replacement.
Sancho’s arrival would give Solskjaer more opportunities to try Mason Greenwood in the middle in what many see as his most natural position.
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Meanwhile, United are also on the hunt for a center-back and have been linked with a move for Raphael Varane from Real Madrid.
Madrid are ready to let the Frenchman go for the right offer, despite Sergio Ramos’ imminent departure.
Varane has only one year left on his current Bernabeu contract but refuses to sign new terms as he seeks to double his salary.
Paris Saint-Germain are among several clubs that are said to be interested in the 28-year-old, but United are said to be in the driver’s seat.
Solskjaer is also keen to add Kieran Trippier to his squad this season, but could struggle to convince Atletico Madrid to sell.
Trippier was a key cog on Diego Simeone’s side last season as they rushed to the Liga title and Atleti will not want to leave him without a fight, although it has been reported that the player wants to move to Old Trafford.