Romelu Lukaku is expected to return from injury when Manchester United take on Stoke on January 15, boss Jose Mourinho has confirmed.
Lukaku needed oxygen as he was taken off on a stretcher after a clash of heads with Southampton defender Wesley Hoedt, report the Manchester Evening News.
Mourinho said after the game he expected Lukaku to miss the New Year's Day trip to Everton and FA Cup third round visit of Derby on Friday night but was hopeful the 24-year-old would be available for the Stoke encounter.
Anthony Martial started at Everton in Lukaku's absence and Mourinho provided an update on the United number nine before kick-off.
"I would say a week," Mourinho told Sky Sports. "It's nothing really important - just a little protection, but no problem.
"If we don't have a player like Lukaku or a normal replacement like Zlatan, we have to play with the qualities we have, so we have to forget that we have to play without a target man because we don't have.
"We have what we have. We trust the players. The players are giving everything like they have done from the first minute of the season.
"No Lukaku and no Ibrahimovic means we have no number nine as you normally call a target man that we usually play, so we have to change."