According to the Mirror, De Gea will not play the Europa League final, if Manchester United eventually beat Celta to make it to Stockholm.
The same source has assured that Mourinho has informed his technical staff: If United get to the Europa League final, the goalkeeper will be Sergio Romero.
Mourinho is under the impression that De Gea's attention is at the Bernabeu, rather than at Old Trafford, which is why he will not hesitate to leave the first-choice keeper out.
Last week, Mourinho already implored his keeper to focus on the current season, and it seems nothing has changed. We will see if United make it to the final and if Mourinho follows through on his 'punishment'.