Romelu Lukaku is set to miss Manchester United's next two matches with concussion but his head injury has been deemed 'not serious'.
The Belgian striker went down in a heap after clashing heads with Southampton's Wesley Hoedt in United's 0-0 home draw on Saturday.
He received treatment on the pitch for several minutes before being stretchered off amid fears he could be in serious trouble.
However, the former Everton striker will be able to resume action when United face Stoke City on January 15.
Even if he feels well enough in himself to play sooner, new Premier League rules prevent him from returning less than seven days after the occurrence of a head injury.
United manager Jose Mourinho said, as quoted by Belgian publication HLN: "I cannot give an update yet. But when it's bad news, it normally arrives immediately. And that is not the case.
"But if you look at the way he leaves the field, you do not have to think twice about cutting a knot. It will not only be a problem for today, but also for the next two matches. I can assure you."