According to BBC Sport
, Rooney was injured when he tried to block a free-kick and Fulham's Hugo Rodallega landed on his thigh.
The injury was sustained during Manchester United's 3-2 victory over Fulham, Saturday, The Daily Mail
"Wayne is off to the hospital and it looks like he will be out for 4 weeks," Sir Alex Ferguson, manager of Manchester United said according to The Telegraph
. "We have to take care of these things in terms of infection, but hopefully he will be okay. Rodallega followed through with his shot, and has obviously caught him, but it was an accident, of course. It looked like a really bad one, though."
According to the Daily Mail
, surgeons could not believe how deep Rooney's gash was.
The 26-year old forward stayed at the hospital overnight.
In order to fill Rooney's void, Ferguson must rely on Robert Van Persie, one of the teams more recent acquisitions, BBC News
This shouldn't be an issue as Ferguson seems rather impressed with Dutchman's performance so far.
Van Persie scored his very first goal for his new team at the first home game he played with them.
"It was a fantastic strike, no hesitation. a magnificent hit that set the place alight," Ferguson said of Van Persie's goal.
Meanwhile, Rolladega is not being blamed for Rooney's injury, The Daily Mail
Earlier Sunday, Wayne Rooney's wife Coleen, tweeted
: "Thanks for all your get well messages for @WayneRooney! He's home from hospital now, leg stitched up, feeling ok."