Ryan Giggs is unlikely to accept a lesser position under the ex-Chelsea manager following nearly 30 years at the club
But his next move will be finalised within days when he meets the Special One face-to-face.
Mourinho is still completing his backroom staff after taking over from Louis van Gaal at United for the new season.
Portuguese coach Rui Faria, who worked with him at Chelsea, will be the main assistant — the role Giggs had under LVG.
Giggs, 42, is said to be unlikely to accept a lesser role.
He may now choose to go into management on his own, two years after hanging up his boots to focus on coaching.
Giggs had dressing-room support to take over as manager from LVG. But United went for Mourinho to try to get the club back on track as title contenders.
Meanwhile, Ashley Fletcher will go on the pre-season tour with United. The striker, 20, who was on loan at Barnsley last season, has turned down a new deal at Old Trafford.
But he will get the chance to impress Mourinho before the new campaign.
Players returning from the Euros will need time to recover, so Fletcher will be handed an opportunity.
