Van Persie facing month out
United boss David Moyes confirmed the Holland international had suffered the injury when he took the corner that led to Phil Jones' match-winner in the Champions League triumph over Shakhtar Donetsk on Tuesday.
"Robin van Persie is out for a month," said Moyes.
"He picked up a thigh strain in taking a corner kick which led to the goal."
"It is unfortunate because I think if you look at our record with Wayne Rooney and Robin in the team it is actually very good and we have not had them for quite a period recently.
"That is a big blow to us."
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