Eoin Morgan hailed his team’s outstanding performance as the World Cup hosts stormed into the semi-finals with a 119-run thumping of New Zealand at Chester-le-Street.
Morgan also praised ‘outstanding’ performance of opening Jonny Bairstow who struck his second consecutive hundred to set a platform for his side.
Bairstow top-scored with 106 from 99 balls and Roy added 60 before England bowlers finished the task, knocking out New Zealand for 186.
"I thought we were outstanding today. It started with the two boys at the top of the order. They set a good solid platform playing in the manner they do. Jonny getting his hundred was match-winning," Morgan said.
"The wicket did change after the 25th over and it did slow up. It was difficult to score. Every batsman found that so to have so many on the board was encouraging. It was about trying to get as close to 300 as possible."
After losing to Sri Lanka and Australia, England were in danger of making it to the semi-finals but convincing performances against India and New Zealand have instilled that belief once again that they can lift the trophy for the first time.
Morgan believes that England have rediscovered the aggressive, confident style which propelled them to top of the rankings.
"The manner in which we have played in the last two games is the identity we have been playing with for the last four years," Morgan said.
"Playing with freedom and intent with the bat and had bowlers looking to take wickets throughout the 50 overs with the ball. Hopefully we can produce that aggressive, positive identity in the semi-finals."
New Zealand are most likely to make it to the semis as Pakistan need a massive win against Bangladesh on Friday to take over the fourth spot in the table.
New Zealand skipper Kane Williamson admitted his side were outplayed by England and they needed to improve moving ahead in the tournament.
"Full credit to the way England played today. We definitely need to be better moving forward," Williamson said. "England did get the best of the conditions but they were the better team. They outplayed us in all facets.
"Going ahead, touch wood, hopefully it all works out and we are in the semi-final but in some ways, it starts again. We haven't played our best cricket yet."