After Walcott's magnificent hat-trick in Zagreb, Capello said: "When I put my faith in Walcott, I had the sensation and belief he could give me that little bit extra.
"But he honestly gave much, much more than even I expected. I think it depends on the coach's qualities to understand when the moment has come to field a youngster.
"It's really important for a young player to gain experience - but the world-class ones emerge rapidly.
"As it is far more difficult to play in the national team, you can only rely on a youngster if he is really good, and not just playing quite well with his club.
"You play one match and you are judged on it for a month and a half.
"The same goes for the coach. If you don't win a match in which you fielded a youngster they wonder why you didn't choose someone more experienced.
"This is a new adventure for me, a new challenge, and what is important now is to be focused and determined.
"It's a new way of working - it's harder to get your ideas, desire and tactics across because we don't spend a lot of time together.
"You have to be able to condense what you want to teach your team."