Henrikh Mkhitaryan's social media activity suggests that the Manchester United star is facing a spell on the sidelines with a hamstring injury.The Armenian international pulled up in the 25th minute of United's victory over St Etienne, shortly after scoring the one and only goal that put the Red Devils into the last-16 stage of the Europa League.After the match, manager Jose Mourinho told the media that he expected Mkhitaryan to miss this Sunday's EFL Cup final, along with Michael Carrick, who suffered a calf injury during the match.[ad_pod id='now-tv' align='centre']The extent of Mkhitaryan's injury is not yet known, but in his latest tweets he said that he was 'keeping his fingers crossed'.

The 28-year-old's teammate Juan Mata also chimed in, wishing for a speedy recovery.

If Mkhitaryan and Carrick are both ruled out of this weekend's showdown at Wembley, then Mourinho could turn to either Marouane Fellaini or Bastian Schweinsteiger.

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