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According to the official "Manchester United" website, one of the club's leaders - Wayne Rooney - suffered a shin injury in the victorious match against "Aston Villa" and was substituted in the 79th minute.
It will be revealed today whether the injury is more serious.
It is already in doubt whether Rooney will be able to participate in the friendly matches of the England national team against Sweden.
It is unclear whether the injured "Arsenal" forward Theo Walcott will also join the national team.