The Spanish goalkeeper will see his contract expire at the end of the year.
He is one of many United stars who see their terms come to an end in the summer, including Juan Mata, Ander Herrera and Chris Smalling.
However, unlike those mentioned, De Gea's contract contains a clause that will extend its contract with another year.
But the red devils are reluctant to trigger that clause, as they know that it will mean defeat in any further contract negotiations.
United still hopes that a deal can be met with the 28-year-old.
But time runs out and from all conversations have not managed to get an agreement.
It has led to the European giant Juventus registering an interest – losing legendary goalkeeper Gianluigi Buffon in the summer to Paris St-Germain.
Wojciech Szczesny is currently Turin Club No.1 but The Sun has reported that Juve is looking at alternatives.
The sun continues to report that the old lady either hopes to meet a bargain agreement in the summer or wait until next year, where he will be available for nothing.
Juve is famous for completing average price transfers, such as Emre Can, Sami Khedira and Andrea Pirlo, who all arrive at Frees.
Jose Mourinho would fuming if he let his star between the posts go for nothing but the club is yet to make a decision.
De Gea is desperate to win the Champions League, but United is some way outside even challenging for the trophy.
It's even worried that Old Trafford outfit will not even do the competition next year, with the club currently releasing in the eighth in the Premier League.
The sun continues to report that if De Gea would leave Manchester, there is already a replacement occupied.
Jordan Pickford in Everton has become eyed as the ideal man to come to the Spanish international spot.
The former Sunderland star has seen its share increase since the World Cup, where he played for England when they reached the semifinals.