Scott McTominay's season could be over after suffering a knee ligament injury in Manchester United's Boxing Day win.
The 23-year-old was pictured leaving Old Trafford on crutches after the 4-1 victory over Newcastle.
And manager Ole Gunnar Solskjaer later confirmed McTominay's potentially serious injury blow.
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After the victory, Soksjaer said that McTominay had "done his ligament in the knee".
He added: ""I don't know how bad it is. The boy has got the biggest heart of the lot. You know when you stiffen up. We'll find out tomorrow how it is."
McTominay was pulled off at half-time and replaced by Paul Pogba at Old Trafford.
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He was walking the tightrope after being booked early on and escaping a red card.
But McTominay's injury problems soon became clear after the match as well and he could be set for an extended spell on the sidelines.
Manchester United came from a goal down to thrash Newcastle 4-1 at Old Trafford.
Matty Longstaff, who scored the winner when the sides played in October, stunned Old Trafford with his early goal to give Steve Bruce's team the lead.
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But Manchester United hit back in style to lead 3-1 at the break with a brilliant comeback.
Anthony Martial levelled the scores in the 24th minute before Mason Greenwood lashed home to give the Red Devils the lead.
Marcus Rashford's strike in the 41st minute gave Ole Gunnar Solskjaer's side breathing room going into half-time.
Martial grabbed his second goal in the 51st minute as Manchester United moved within four points of fourth-placed Chelsea.
Featured Image Credit:Topics:Β Manchester United, scott mctominay