Captain John Terry admits there is still work to do before England are the finished article, but he is confident necessary improvements will be complete in time for the World Cup.
With a place at next summer's finals already secured, an experimental Three Lions side earned a 3-0 win over Belarus on Wednesday night to complete their qualification campaign with a record of nine wins out of 10 games.
The scoreline flattered Fabio Capello's England against their minnow opponents, but the Italian had used the opportunity to observe the ability of a number of his fringe players.
Terry, though, believes that even a full-strength side needs to improve before travelling to South Africa in 2010 in order to compete with the likes of European champions Spain.
The Chelsea defender told Sky Sports News: "I think when you look at the likes of Spain and the top sides across the world, we have got maybe another 20 or 30 per cent to go.
"But I think we can do it. We have had a very good campaign. Nine wins out of 10 is a good start to where we want to be.
"We have got a few friendly games coming up before the World Cup gets going so, with a few minor adjustments and players fighting for position, it is good at the moment."
Peter Crouch underlined his credentials as he scored twice against Belarus, with a Shaun Wright-Phillips goal sandwiched in between, and earned praise from Capello.
The lofty Tottenham striker's display was also hailed by international team-mate Frank Lampard, who said: "He is a regular scorer. Every time he plays for England he seems to score.
"It is great to have that competition up front. He has come in with a chance and has done his stuff.
"He is a very different option for us. He is very good in the air, but also very good with his feet. Plus, he scores goals."