VB Series, Sydney: Australia 344-6 (50 overs) beat South Africa 287-6 (50 overs) by 57 runs
Australia made a massive 344-6 to set up their second successive VB Series victory over South Africa by 57 runs.
Gilchrist put on an amazing display of driving
Adam Gilchrist hit a devastating 88 off 66 balls in Sydney as Australia posted their second-highest score at home.
Also contributing were captain Ricky Ponting (72), Damien Martyn (79) and Mike Hussey, who hit 47 not out.
Mark Boucher blasted 76 in reply, but the tourists were always behind and must now beat Sri Lanka on Tuesday to reach the best-of-three final.
South Africa, without key bowler Shaun Pollock, who was resting a bruised left heel, appeared powerless against Gilchrist after the hosts won the toss.
The wicketkeeper brought up his half-century in the eighth over from only 29 balls in an impressive display of driving.
AUSTRALIA'S HIGHEST SCORES
359-2 v India, J'burg, 2002/03
359-5 v India, Sydney, 2003/04
349-6 v NZ, C'church, 1999/00
347-5 v NZ, Napier, 2004/05
347-2 v India, Bangalore, 2003/04
344-6 v SA, Sydney, 2005/06
344-7 v Zim, Hobart, 2003/04
But, after scores of 116 and 33 in his previous two innings following a much-needed break, he was denied a 14th century in his 231st match.
Monde Zondeki saw his opening four overs dispatched for 42 runs before he was relieved of his duties by super-sub Charl Langeveldt, who made the breakthrough when Gilchrist miscued a pull.
Ponting continued the onslaught in a 61-ball innings that include eight fours, although he fell for the second time this series to spinner Johan Botha, lobbing a catch to midwicket.
Martyn helped his skipper add 35 for the fourth wicket then played the senior role as he put on 60 with Michael Clarke (27).
Martyn's 75-ball stay included just five boundaries before he was run out off the final ball of the innings.
Hussey hit a six off Van der Wath in a 33-ball cameo at the death that helped add 81 in nine overs.
Australia's only higher score at home came at the same ground two years ago, a total of 359-5 against India.
That equalled their highest ever total, hit against the same opponents in the 2003 World Cup final.
Boucher kept South Africa in touch under the lights
South Africa were behind the pace even before captain Graeme Smith gloved Brett Lee behind with seven on the board in the third over.
Only when Herschelle Gibbs and Boucher were putting on 53 for the third wicket did they look like catching up.
When Gibbs was smartly stumped off Andrew Symonds for 46, Boucher kept blazing.
The in-form wicketkeeper, promoted to fourth in the order, crashed two sixes before giving Nathan Bracken a catch in the deep in the 37th over.
Johan van der Wath, batting at eight, smashed 37 off 16 deliveries to make sure South Africa's score of 287-6 was the highest-ever losing score at the SCG.