Wilshere will start tonight against Brazil.
"Iâ€™m wary Jack is only 21," said the England manager.
"He had a fantastic debut two years ago and has missed a year of football, so I want to play down expectations, but you canâ€™t deny he is an exceptional talent.
"We saw a bit of him in Stockholm, but that was Jack just coming back. Heâ€™d only played a couple of games for Arsenal. Now weâ€™re seeing a player whoâ€™s much more in tune."