Although the young goalkeeper has been marginalised from the United first team this season by Edwin van der Sar, playing only in cup competitions, Capello has trusted in youth before - notably in selecting Manchester City's Joe Hart - and disclosed he has overlooked Foster until now solely because of a long-running cruciate ligament injury.
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'This time I want to select Foster, because this time he is fit whereas always before he was injured,' Capello said. 'When I arrived here, everybody told me that Foster was a very good goalkeeper. I watched him at Wembley [in the Carling Cup] and he surprised me, in confidence, in everything.'
While England so far have a flawless Group Six record in their World Cup qualification campaign, Capello is poised to have a tough test of his transformative influence in the friendly with Slovakia next Saturday and the critical group match against Ukraine.
'We will be a little bit more tired because of having played more games,' Capello admitted. 'For that reason I will make six substitutions against Slovakia. This time the fans will be the 12th player on the pitch, I'm sure, after our victories. I feel that the crowd will be with us. We need them.'