MANCHESTER, England - Manchester United midfielder Ander Herrara broke a rib in the 2-1 win against West Ham at Old Trafford on Saturday.

United couldn't say on Tuesday how long Herrera will be out.

The injury forced Herrara, an off-season signing from Athletic Bilbao, to be substituted in the 74th minute.

He is the 10th United player to miss action because of an injury.