Manchester United defender Marcus Rojo has been forced to leave the field in the second half of Sunday afternoon's derby against Manchester City with a suspected dislocated shoulder.
The Argentine stayed on the ground following a challenge with Martin Demichelis outside his own box, and an oxygen mask was quickly called for.
Rojo left the field on a stretcher, with Paddy McNair coming on to replace the centre-back.
United were reduced to 10 men in the first period of the Premier League clash after Chris Smalling was sent dismissed.
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