He has, however, become something of a forgotten man after being overlooked by Jose Mourinho on a regular basis.
An early-season settling in period could have been forgiven, as the 27-year-old adjusted to new surroundings in the Premier League, but his ongoing absence has caused bemusement all round.
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There have been regular calls from supporters for his inclusion in an inconsistent side, but those pleas have largely fallen on deaf ears.
Mkhitaryan has been handed just 29 minutes of competitive action since seeing his first start for United – in a derby date with Manchester City on Sept. 10 – brought to a premature conclusion at halftime.
An appearance off the bench in a Europa League defeat at Fenerbahce is all he has been offered since then, but a positive showing for Armenia against Montenegro on Friday has convinced several Red Devils fans on Twitter that he is deserving of a starting berth against Arsenal on Nov. 19.