With the Manchester derby on the horizon, it's fair to say that Jose Mourinho would have been somewhat concerned after it emerged that Henrikh Mkhitaryan picked up an injury playing for Armenia this past week.
Mkhitaryan, 27, has been ruled out of action for up to 10 days after suffering a thigh muscle injury during Armenia's 3-0 defeat to the Czech Republic.
It's seemingly unlikely, then, that the former Borussia Dortmund midfielder will take to the field against Manchester City at Old Trafford next Saturday.
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But United fans will take comfort from the fact that Mkhitaryan has revealed that he is already back in Manchester.
He tweeted: "My dear fans, I appreciate much that you worry about me, thank you! I'm now back in Manchester for treatment and hope to be fit very soon!"
In fact, Rob Dawson of the Manchester Evening News believes that Mkhitaryan could yet make an appearance at the Theatre of Dreams next weekend.
Here's the statement the Armenian FA released on their website:
As you know, August 31, in the Czech Republic and Armenia, the senior national team Henrikh Mkhitaryan named Armenia injury as a result was unable to continue the match. Henrikh Mkhitaryan has passed a medical examination Mlada Boleslav in one of the clinics. Unfortunately, the results are not encouraging. Mkhitaryan was found in the lower third of the left thigh muscle injury. Such injuries usually required for healing in a week to 10 days, which means that Mkhitaryan will miss the September 4 in Copenhagen, Denmark-Armenia match will be held at the stadium "Parken".
Mkhitaryan still hasn't started for the Red Devils this season but impressed during the club's dramatic victory over Hull City. He came off the bench to help Mourinho's side secure a stoppage-time winner at the KCOM Stadium.
But with Mkhitaryan doubtful, Spaniard Juan Mata could now keep his place in the starting XI for the game against the Citizens. The ex-Chelsea man has enjoyed a solid start to the campaign, but will be well aware that he also faces competition from the likes of Jesse Lingard and Memphis Depay.
Do you think Mkhitaryan will be fit for the Manchester derby? Have your say below!