The Spaniard has played a vital role under Mourinho and led the side out as captain for Saturday’s 0-0 draw at home to Burnley.
Mata has made 13 appearances and scored three goals for United this season, but has had a bigger impact, linking up play and getting the ball forward.
Speaking about his time under Mourinho, Mata claims he was always aware of his situation.
“Too many stories were created,” he said.
“I’m the one that knows what is going on and nothing was going on.
“Since I came to United there have been ups and downs but I always felt like an important player under every manager and I am feeling important right now. But I have not had any conversations [with Mourinho] like they say I had.
“I said it before and I say it again, it is a professional relationship with Mourinho. That is it.
“That is why I said so many things were written about him coming with me at the club and what was going to happen. But in my mind I had it clear.
“Your friends and family want to know what is going on but I always told them the same. I am the one that knows what is going on and nothing was going on.”
Mata hadn’t put a foot wrong throughout the entire clash against Burnley and supporters grew frustrated with Mourinho following his decision to substitute the Spaniard off in the second-half.
He has showcased he has plenty to offer and will undoubtedly be confident about his position under Mourinho after working hard to cement his place in the first-team.