Eoin Morgan believes England can seal World Cup glory if they maintain their "A-game" which brought them success in the high-stakes clash against India on Sunday.
They were markedly better in their 31-run win over India, ending their unbeaten streak in the tournament.
Jonny Bairstow smashed a century upfront, forging a strong 160-run opening stand with Jason Roy, who returned from injury to score an attacking 66.
Ben Stokes extended England's dominance with the bat towards the end of the innings as he fired a rapid 79 to take his team's total to 337-7.
India in reply constantly found themselves choked during the chase against England's Chris Woakes and Liam Plunkett, who troubled them with tight lines and lengths.
"I'm delighted," said Morgan, whose side will now play against New Zealand to secure a spot in the semi-finals.
"The manner in which we played today was outstanding and resonates with everyone in the dressing room. It's come at a good time against a really good team."
England are yet to register a maiden World Cup title but Morgan insisted: "Having played how we did today is very encouraging for us.
"The closer we get to playing our A-game, the more chance we have of going all the way.
"If we were scraping along I wouldn't be as confident."
Bairstow's century came after criticism was directed towards the right-handed batsman's "negative" approach in the last couple of games.
An ecstatic Morgan spoke highly of Bairstow as he said: "He does tend to get fired up and that suits him, regardless of what's happened in the week.
"He likes a bit of fire in his belly and I don't mind that when he comes out and plays like that."
Meanwhile, Bairstow advised his critics to show some patience for whenever he or the team fails.
"Look, I'm not saying I want everyone to come out and abuse me! By no means am I saying that.
"There's different ways you can look at it. Along the way people have questioned technique, people have questioned conditions, everything like that."
"You're going out every time to try to score a hundred. Sometimes it comes off, sometimes you nick one, sometimes it misses the stumps and goes for four and off you pop, you're away and running."
Morgan admitted Roy's return has strengthened the England batting line-up.
"Having him back is a big confidence booster – he's very intimidating, hard to bowl to and he's a gun player."
Morgan also shed light on Woakes' consistent efforts with the ball by saying: "He is a guy who goes unnoticed but he's an extremely valuable player for us and a great asset in the first 10 overs."
Plunkett's knack of taking wickets in the middle overs was on the fore once again and Morgan commented on "an outstanding effort from a very experienced player".
The Edgbaston crowd was overwhelmingly in favour of India despite England playing the match as the home side.
"It was a fantastic atmosphere," said Bairstow. "We know the fanatical support the India team have.
"There are two ways you can go about it -- you can either be intimidated by it or you can go and relish it and enjoy it.
"I think the experience of guys now playing around the world in different competitions, especially in the IPL (Indian Premier League), allows people to get used to the noise, definitely the noise, and enjoy how fanatical the Indian public are about our great game."