The 24-year-old led Manchester United out as captain for the primary time on Tuesday evening for his or her Champions League opener towards Basel.
But the France world lasted simply 19 mins of the Three-Zero Group A win ahead of a hamstring criticism compelled him off.
Pogba left Old Trafford on crutches and has passed through scans.
But Mourinho insists no definitive diagnosis has been made on the midfielder’s go back date amid communicate of a three-month lay-off.
“I don’t know if it is 12 weeks or 12 days,” the United boss stated after this night’s Four-Zero defeat of Everton.
“Honestly, so any remark, any hearsay is completely fallacious, as a result of we have no idea whether it is 12 weeks or 12 days.
“The participant used to be identified to begin with after the fit as a result of the stipulations of the muscle and the bleeding.
“The determination used to be another week to attend and to look in reality obviously within the scans the size of the damage.
“And no person within the membership spoke about 12 days or 12 weeks. Not in any respect.
“It’s a muscular damage within the hamstring, however we now have an ordinary process and wait a couple of extra days, so it is totally nonsense data.”