After a comprehensive win over Slovakia on Saturday, England will not be taking anything for granted against their undefeated Group 6 counterparts.
The Slovaks were over-run by a fluent England side and Barry is hoping for more of the same on Wednesday evening against Ukraine in the nation's fifth World Cup qualifier.
The midfield anchor is insistent that the Three Lions put the 4-0 weekend victory behind them and remain focussed on collecting maximum points at Wembley.
"There have been a few comments made about our home form and there's not been a performance for a while so to score four goals and play some good attractive football was good," Barry told journalists at a press conference today.
"The players all seemed to perform pretty well and the movement and passing was very good against Slovakia.
"It's all about instilling confidence back in the players. Everyone knows we have world-class players and everyone knows we can match anyone on our day.
"The 100 per cent start in the group is brilliant and it has set the group up nicely for us but there are tough games still to go, starting on Wednesday. It's the first test of many to come and we're not taking our foot off the gas.
"We're expecting a completely different game; it's a competitive match and we have to show Ukraine a lot of respect."
Barry, though, believes the Three Lions can still roar to a positive result, despite the increasing injury list, which now includes the names of Emile Heskey, Carlton Cole and Peter Crouch, who may yet feature.
He said, "It was very strange what happened with the injuries, especially with two or three in the same position. But we still have good quality options up there. Hopefully Wayne Rooney can stay fit and Darren [Bent] has been called up.
"There are loads of options; you're not going to be in the England squad if you are not a top player. It's up to the manager who plays but whoever is picked is more than good enough."
Alan Dawson, Goal.com