Last week, it was suggested that United were prepared to pay in the region of £75m for the England international, who is seemingly keen to make the switch to Old Trafford.
However, a year after proving tough negotiators over the attacker's future, Dortmund are allegedly not prepared to accept United's current bid.
According to talkSPORT, United have been informed that they must pay £77m plus add-ons to wrap up a deal for the 21-year-old.
Sancho has two years left on his contract at the Westfalenstadion, giving Dortmund some breathing space with regards to waiting for their asking price.
The Bundesliga club have reportedly set a deadline of July 23 for the situation to be resolved. body check tags ::