Australia captain Michael Clarke wants to see his build on their win over Afghanistan with a strong performance against Sri Lanka in Sydney on Sunday.
The meeting at the SCG could prove crucial in determining quarter-final match-ups, making a victory key for both sides.
New Zealand (eight points) are top of Pool A, with Sri Lanka (five), Australia (five) and Bangladesh (five) behind them.
Finishing outside the top two is likely to set up a tough Cricket World Cup quarter-final, likely against South Africa.
Clarke was delighted with his team's performance in the 275-run win over Afghanistan, particularly after a disappointing loss to New Zealand.
"The batters found the practice pitches in Western Australia were really tough, old wickets, so it was hard to play shots on," Clarke wrote in his column for News Limited on Saturday.
"But blokes still got in the nets and faced our quicks bowling with brand new balls, and after such a tough work out in those nets, I think the batters really took a lot of confidence from that.
"Our bowlers also executed superbly again against Afghanistan and after a sound win over England, an unfortunate washout to Bangladesh and the narrow loss to the Black Caps, the team has some good momentum.
"Now we must maintain that same attention to detail against an experienced and talented Sri Lanka at the SCG tomorrow, a game that will play a huge role in who we play against in the quarter-finals."
Clarke has returned from a hamstring injury, but batted only once at the World Cup - making 12 against New Zealand.
He remains happy with his form despite a lack of match practice.
Clarke also said Shane Watson, dropped for the last match, had a role to play, but the all-rounder is unlikely to face Sri Lanka.
David Warner found some form against Afghanistan with 178, while fellow opener Aaron Finch has also made a century at the tournament so far.
Mitchell Starc has been Australia's standout with the ball, taking 10 wickets at an average of 9.30.
Sri Lanka have won three straight matches since opening the tournament with a loss to New Zealand.
Much of their run has been thanks to Kumar Sangakkara, the star left-hander having struck two centuries and 268 runs in total.
They do have injury concerns, however, with Dimuth Karunaratne (finger) out for the rest of the tournament and spinner Rangana Herath (hand) likely to miss.