Of course he will try to improve the red devil squad by taking some players and throwing away those who are not needed, Amorim will definitely try to get Ousmane because he is Sporting mainstay defender who has quite good quality so that it will help Manchester United to get better defense.
This will be interesting, two English giants will fight for one player and indeed they both need strong defender, but I think Ousmane will prefer to join Manchester United and can return with Amorim, the coach who previously handled Sporting.