Manchester United midfielder Michael Carrick has been ruled out for three weeks with an Achilles injury.
Carrick had an injection on Thursday after informing manager Sir Alex Ferguson the long-standing problem was starting to bother him once again.
"He should be out for three weeks, maybe a month at most,'' said Ferguson.
Carrick was an unused substitute during England's recent Euro 2012 double-header but has not started a game for United since the Community Shield triumph over Chelsea at Wembley last month.
"He has had a problem with his Achilles,'' added Ferguson. "It has been bothering him for a few weeks now, so we sent him to a specialist in London yesterday and he had an injection. We are hoping that settles it down.
"We have been considering what we should do about it. The best thing is to get it treated and out of the road now because everyone in the squad is fit.''
Brazilian midfielder Anderson is unlikely to be involved on Saturday after picking up a slight knock on reserve team duty on Thursday night, although Ferguson does not believe the injury is too serious.
"Anderson came off with a little niggle yesterday but it is nothing serious,'' Ferguson said. "It is just the fact he has been out for a long time and he is just coming back. I don't think it will knock him back any length of time.''