The youngster spent last season on loan with Spanish side Granada, making 37 appearances in all competitions but he was unable to help the Andalusians avoid relegation from La Liga.
Despite enjoying his loan spell, Pereira said that he was pleased to be back. "It is a very nice feeling (to be back), I am very happy," he explained. "I am glad that I am here on the tour."
"I think I will have the chance to kick on and I want to kick on here. I want to play and show everyone that I can help the team and I want to win trophies and help everyone getting trophies and get a good season."
When asked about the possibility of another loan move this season, Pereira replied: "No, now I am focused at United. I am here and I want to stay here and I believe I am going to stay."