United boss Jose Mourinho wanted the midfielder to stay in Manchester this season and might be tempted to bring him back to Old Trafford in January.
But Pereira has made it clear he does not wish to leave Valencia any time soon.
The 21-year-old told Super Deporte: “Yes, I want to be here, help Valencia until June. I came with that thought, I know that there is a clause in the contract and now I have to wait to see.
"But my mind is focused on Valencia and I want to stay here.
“It is important that I am playing to grow, improve and help Valencia. It would be very difficult to return to United at mid-season and continue with the same evolution that I'm having now here."