The 21-year-old opted to join Valencia on a season-long loan last month despite having featured in all of United’s pre-season fixtures.
Pereira departed after failing to make United’s matchday squad for their opening three Premier League games. And Mourinho admits he’s disappointed that the midfielder did not want to fight for his place at Old Trafford.
‘Andrea’s Pereira was a personal decision, a decision I don’t agree with, a decision I don’t think honestly is the best decision for him, a decision that disappoints me a little bit because I think he has the potential to be fighting for a position, fighting to for opportunities and to be a Manchester United player,’ said Mourinho.
‘His decision can be considered as a young player who wants to play every weekend but can also be considered a decision as a player that is not ready to fight for something difficult and it’s difficult to play in Manchester United’s midfield.
You have to be ready to fight for the position and I am a bit disappointed he left. But, OK, it was his decision. I open the door for his decision.
He has a long-term contract. We have the option to bring him back in January, so we have that situation under control. It is not a drama but it is a decision which disappoints me a little bit.’