Ibrahimovic will reportedly join up with his new United team-mates next week.
The 34-year-old summer signing is yet to begin pre-season training at Carrington, having been on international duty with Sweden at Euro 2016 prior to his move.
But the Manchester Evening News claim will start training with United next week, meaning he won’t feature at Wigan this weekend.
Mourinho’s first friendly will be at the Championship club on Saturday.
However, Ibrahimovic could be on United’s tour to China, with a potential debut for their game with Borussia Dortmund on July 22 mooted.