The Red Devils boss has urged the club to extend the stay of the Spanish international, who is poised to become a free agent next summer.
Though United have the option of triggering a one-year extension in De Gea's contract.
Negotiations with the 27-year-old have been ongoing for a number of months, but it is understood that no agreement is close to being made.
Speaking to Sky Sports, Mourinho said: "I am not confident. I cannot find the word in English, but let's see what happens.
"Only the club, David and his people can answer that. My comment is only that everyone knows how good he is, how important he is for Manchester United.
"And, if the club want to be better than it is and not worse, obviously it would be very important to keep David."
SunSport exclusively revealed that the Special One fears De Gea will move on at the end of the season to join Serie A giants Juventus.
The ex-Atletico Madrid shot-stopper was a long-term target of Real Madrid, but Los Blancos opted to sign Thibaut Courtois from Chelsea instead.
De Gea featured against the Old Lady at the Theatre of Dreams this week, where he expertly denied Cristiano Ronaldo from doubling Juve's lead.
Source: Read Full Article