De Gea nearly joined Real in 2015 only for a faulty fax machine to scupper the deal.
However, the Spain international looks set to finally move to the Bernabeu at the end of the season.
Premier League stats: Which goalkeeper has the most clean sheets in 2016/17? Wed, March 22, 2017
Express Sport takes a look at which Premier League goalkeeper has the most clean sheets so far in the 2016/17 season
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Which goalkeeper has racked up the most clean sheets so far this season?
Manchester United have reportedly agreed to part with David De Gea
The report then says the two clubs have agreed to weaken Barcelona as a result.
It is said Madrid chief Florentino Perez has told United boss Jose Mourinho to sign Marc-Andre Ter Stegen as De Gea's replacement.
Ter Stegen has been in fine form for Barcelona this season following the departure of Claudio Bravo to Manchester City last summer.
Manchester United have been urged to sign Marc-Andre Ter Stegen
United have reportedly already approved the Catalan giants over a transfer but Barcelona are so far reluctant to part with their star goalkeeper.
Real could also benefit if Ter Stegen stays put, with the goalkeeper possibly set to demand a new contract. Should he sign, then Barcelona will have to shell out a large amount to keep him – something that could effect the rest of their transfer plans.