Fergie insists Foster is still the best English keeper at Fabio Capello's disposal and can hold on to his place in the Three Lions starting line-up.
He said: "Ben is staying here. He's made a couple of mistakes in games where his performance level has been good.
"The problem is he's got Edwin van der Sar in front of him.
"Is he England's best keeper? Yes, without doubt. He's got the best presence, he's the quickest and brave."