Don Balon says Mourinho will veto any proposed De Gea departure if he takes over the Old Trafford hot-seat.
Real Madrid are long-term admirers of the Red Devils star.
And it's thought United could struggle to keep hold of the 25-year-old if Real come calling again.
But it's understood former Chelsea chief Mourinho views the keeper as integral to his long-term plans and will snub Real's advances.
