The striker was on the suffered a deep gash on his thigh during their win over Fulham last week but the boss believes that he could return within a month's time
Manchester United manager Sir Alex Ferguson has confirmed Wayne Rooney will return to action in four weeks.
The former Everton star suffered a deep gash to his thigh after coming on as a substitute in their 3-2 win against Fulham at Old Trafford.
Early signs suggested that Rooney could be out for some time, but Sir Alex has now confirmed the 26-year-old will return to action sooner than first feared.
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"Wayne's out for four weeks," Sir Alex revealed to reporters.
"It's nothing serious on the actual gash - it's a bad one but it was treated carefully very quickly. We don't expect any complications from it. I think he'll be back in four weeks.
"The fact it's a gash and not a muscle or joint injury means he can do a lot of work in the gymnasium. We're not too bad with that."