#1 Andreas Pereira
Since his Premier League debut in 2015, Pereira has struggled to cement a first team place for United. The youngster has gone on two loan spells at Grenada and Valencia in the last two seasons.
Instead of fighting for his place last season, he opted to go on another loan spell and Mourinho called him out for it. Young players like Scott McTominay broke into the ranks in Pereira's absence. The Brazilian has scored one goal in 13 appearances for United.
When on loan in Spain, he scored 6 goals in 66 appearances. A quick look at United's attacking players and one will see little room for Pereira in the starting line up, let alone the match day squad. Mourinho already added Brazilian international midfielder Fred to his team.
This will enable Paul Pogba to venture forward. Juan Mata, Alexis Sanchez and Jesse Lingard are other creative players who are ahead of Pereira in the pecking order. It will be better for both parties if he goes elsewhere to develop his career.