Australia's seven-wicket win over England was closer than it looked, according to skipper Ricky Ponting.
Our openers have got us off to good starts throughout the tournament, and Michael Clarke looked terrific
Australia captain Ricky Ponting
He said: "It was a pretty tight game right the way through - Kevin Pietersen and Ian Bell played beautifully after we got a couple of early breakthroughs.
"But I think the difference today was our intensity when the game wasn't going for us in the middle of their innings, and our fielding was great.
"We kept the pressure on and our bowlers did a terrific job at the end."
Ponting explained his decision to delay taking the third powerplay, saying: "We kept it back as Kevin and Ian were going pretty well at that stage, and when you take a powerplay early on with set batters it's pretty hard work for the bowlers.
"I decided to hold it off to see if we could get the ball to reverse, and Shaun Tait was terrific in that spell.
"I think when the powerplays first came in, captains were trying to get them out of the way right at the start.
"But with varying conditions around the world, there are going to be times when it's going to be in your favour to take them later in the innings, and today was one of those days."
On his own batting performance in making 86, he added: "Today wasn't very pretty, but we're getting a few runs.
Paceman Shaun Tait captured three wickets for Australia
"Our openers have got us off to good starts throughout the tournament, Michael Clarke looked terrific and Andrew Symonds got a bit of time out in the middle.
"Hopefully we can keep improving as the tournament goes on."
Man of the Match Tait, who took 3-41, added: "I was quite happy with the way I bowled with the new ball, which was a change from the previous games.
"Today I bashed them in a bit more, and I feel I'm a bit smarter about my bowling.
"We all stepped up as Glenn McGrath fought back well, Bracks [Nathan Bracken] took three wickets at the end which was fantastic."