Manchester United defender Marcus Rojo stretchered off at Etihad Stadium

Manchester United's Argentinian defender Marcos Rojo crosses the ball during the English Premier League football match between Manchester United and Queens Park Rangers at Old Trafford in Manchester, north west England on September 14, 2014
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Manchester United centre-back Marcos Rojo suffers a suspected dislocated shoulder in the Premier League clash against Manchester City at the Etihad Stadium.

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.

Chris Smalling of Manchester United leaves the field after receiving a red card from referee Michael Oliver during the Barclays Premier League match against Manchester City on November 2, 2014
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