The Premier League giants have been working on a deal to sign the Dutchman for several weeks and an agreement is in place between the two clubs.
Manchester United and Barcelona have reached an agreement over a fee and add-ons, which could take the deal up to €85m.
However, Barcelona’s deferred payments to De Jong are an obstacle and Manchester United are trying to work out the way they can sort out the issue.
But Manchester United are not getting much help from the player’s camp and according to Catalan daily Sport, they have given De Jong an ultimatum.
It has been claimed that Manchester United have told the Dutchman’s camp that they are prepared to walk away if a deal is not agreed upon this week.
The midfielder wants to stay at Barcelona but the club have been trying to convince him to agree to a transfer given the financial implications.
Barcelona cannot afford his wages under their current salary structure and De Jong is not interested in taking a pay cut.
Manchester United are prepared to reach a compromise with the player and Barcelona over the deferred payments issue.
But they are keen to sort out the agreement this week and are ready to abandon his pursuit if the wait becomes any longer.
