Scott McTominay looked glum as he arrived at Manchester United's training ground on Friday morning after coming off injured in the win against Newcastle.
The midfielder was involved in a challenge with Newcastle midfielder Matty Longstaff in the second minute and appeared to hurt himself, but continued until half-time. Paul Pogba replaced the Scotland international at the break of the 4-1 win and McTominay was spotted leaving the ground on crutches.
And the 23-year-old did not look happy as he was driven into the club's training ground for tests on Friday morning.
Solskjaer said after the game on Boxing Day that the midfielder, who has been key for United this season, had damaged ligaments in his knee.
"He's done his ligament in the knee, probably," Solskjaer said. "I don't know how bad it is, so let's see. The boy has got the biggest heart of the lot, he played until half-time and you stiffen up after. We might have to find out tomorrow to see how it is.
"When they knocked together but you see the attitude of the kid and everyone, to be fair, in the beginning of the game. Not sure if he's gonna be ready for Saturday [against Burnley], probably not, but we've seen him heal quickly before."
United face Burnley at Turf Moor on Saturday and Solskjaer is hopeful he will have some players to recall to the squad.
"I expect players who weren't in the squad today to be available, yes," Solskjaer said. "There were a few players in the training ground. We will still have fresh legs."
