Australia's opening batsman Adam Gilchrist says he has saved a big score for the triangular one-day series best-of-three finals against England which start on Thursday.
The attacking left-hander has made eight centuries in 150 one-day internationals including 124 from 104 balls against England in Melbourne last month.
His best scores in the six triangular one-day matches he played against England and Sri Lanka have been 124 and 53 with an average of 35.83.
"(I'm) saving them up, saving them for the big ones," Gilchrist told reporters on Wednesday.
"Don't waste them in the preliminary games. That's what I'm hoping anyway."
The Australia vice-captain said the home side had been impressive in winning seven of their eight preliminary round matches with good performances from fringe players like spinner Brad Hogg and all-rounder Shane Watson.
However, Australia beat England by just seven runs in Hobart on January 11 and four wickets in Adelaide eight days later.
"If you look at our past two games, they have been much closer affairs than the first two games we played them in the series (where Australia won by seven wickets and 89 runs)," Gilchrist said.
"With that in mind obviously they're showing some improvement. We've definitely shown some improvement with names like Hogg and Watson, they've stepped up.
"If we're improving and they're getting closer that must mean they're on the way up to so we'll expect a tough encounter."
Australia are set to regain leg-spinner Shane Warne after a month-long break with a shoulder injury.
"He's been telling us all that he feels good and he's bowling well so we're looking forward to having him back on the park as soon as we can," Australia one-day captain Ricky Ponting said.
