Currently on-loan at Valencia, Pereira spent last term with Granada and played for Adams.
"It was a different experience," he said of working with Adams. "Every day that I was with him I learned something new because he has so much experience in football and so many stories."
Pereira also told the Daily Mail: "Fighting against relegation wasn't great but it is not an experience I am going to have with United. It is a different type of football and a different kind of pressure. Mentally it only made me stronger."