Leo does not foresee any problems in dealing with the Greek threat and looks further ahead in suggesting that England could go all the way in Japan and South Korea.
"I think they are a good team that have confidence now after good wins," said Leo. "They have a good manager and a lot of good players there.
"It is about putting it all together and I think they are doing that now.
"They have the confidence and when they go to the World Cup they will have a chance of going all the way.
"I really think they have a chance. You need confidence, you need to believe and I think Sven Goran Eriksson has done it right."
Leo, whose nation has dented England's lofty pride more than once over recent years, says the timing is right for an England success, but warns against the perils of expectation.
"There is a good mixture in the squad and I think it is a perfect time for England to go to a World Cup now.
"It's never easy, but if they can go through now and keep the confidence and prepare then they can do well.
"The problem is when England is doing well is that expectation gets very high and that might be a problem, but Eriksson is probably the man to keep them down and focus on the right things."
By Richard Hubbard
Oyvind Leonhardsen harbours thoughts that England might go far at next summer's World Cup finals should they overcome Greece on Saturday.