Didi Hamann warned England fans not to get carried away with the performance of Jack Wilshere against Brazil.
The 21-year-old Arsenal midfielder was a key player in England's 2-1 win over the Samba Boys and several pundits have since suggested Wilshere can inspire the Three Lions to a successful tilt at the World Cup next year.
However, former Germany and Liverpool midfielder Hamann told The Footballers' Football Show Wilshere must first achieve a level of consistency before he can be considered one of the best players around.
"The jury is still out on Jack Wilshere," said the 2004-05 Champions League winner.
"Jack can be as good as he wants to be but I was here not long ago and Wilfried Zaha was made the next saviour. As it is he's played one game for England now he's back in the under-21s, so you've got to keep your feet on the floor.
"Jack's a very talented player and in a struggling Arsenal team his performances and influence have been exceptional. But now he's got to do it on a consistent basis.
"There's a big spotlight on you when you play for England and he's exceptional and talented - but he's got to do it regularly.
"He needs to take Arsenal into the Champions League and produce the performance he showed against Brazil consistently for England."
However, former Scotland international John Collins didn't stifle his admiration of the young Gunner and insisted: "Wilshere is a marvellous player.
"He's got over his injury now and you can see he's got speed, he can beat players and he can make the killer passes.
"Maybe the next stage of his development is to score more goals, but he's a shining light going forward for England."
And former England striker Trevor Francis reckons the Three Lions current forwards will be delighted to have Wilshere in their side, as he creates so many opportunities.
"His greatest ability is to go past players and when he does that he starts to create things," said the former Birmingham City and Nottingham Forest ace.
"If I was playing as a front player with Jack Wilshere I would relish seeing him do that because he commits players and that gives the back four a problem.
"As a front player that's when you find a bit more space - and he has the vision to pick you out. I thought he was outstanding against Brazil."