The Brazilian was discussing how he went on loan to Valencia last season despite the Portuguese boss wanting otherwise.
It was said Mourinho had told Pereira to stay at Old Trafford and fight for his place but the youngster wanted to be guaranteed minutes.
Many believed that would be the end of his career under the former Chelsea manager but it seems bygones are now bygones.
Jose has been praising the midfielder for the excellent pre-season he had as well as his ability to adapt to a defensive midfield position.
According to Manchester Evening News, Andreas said: “It was very difficult for me to take that decision. Like Mourinho is one of the best coaches in the world, and he tells you to stay, and if you go against it you’ve only got things to lose in your head really.
“I was nervous about that, but it came out well. We had a great year in Valencia, and I am a better player, and this season he has a better Andreas than he could have had last year.
“He hasn’t told me [that I have improved], but I think he will see this in games. I have a very good relationship with him, he is very good with me, very honest.”
The truth is Pereira has actually returned from Valencia a better player which is why perhaps Jose has been willing to give him a spot in the first team.
If anything, the 22 year old has a more difficult challenge this season than last season in terms of winning a place in the starting XI.