Alexis Sanchez was forced off with a knee injuryearly in the second half of Manchester United’s 3-2 win over Southampton.
The Chilean is set to undergo a scan on Sunday to determine the full extent of his knee injury.
Sanchez was challenged by Jan Bednarek in the box and twisted awkwardly just five minutes into the second half.
"We don't know yet, it might be ligaments," Solskjaer admitted after the game.
"We'll give him a scan tomorrow."