He has impressed during the club’s pre-season and will be included by Jose Mourinho in Champions and Premier League squad lists.
The 21-year-old offers the Portuguese boss new options, capable of playing on either wing, or as a No.10, especially with Wayne Rooney being offloaded to Everton this summer.
Pereira’s birthday also offers Mourinho an advantage in Premier and Champions League squad regulations, as he at the exact cut-off date to qualify as an Under-21 player, meaning he can be included in both squads for free.
United will be able to register Pereira as home-grown and club-trained for next season as he was signed by Sir Alex Ferguson from PSV Eindhoven in 2012.
He was also included in the last game of the pre-season against Sampdoria and has clearly impressed Mourinho since his season-long La Liga move last season, proving his ability to slot back into the team at Old Trafford.