Australia's comprehensive 276-run victory over South Africa in the third and final game of the ODI series between the two nations was a timely reminder of Australia's ODI capabilities.

The game marked the first time Australia's top three batsmen all scored hundreds in an ODI. You would be forgiven if you forgot that South Africa has actually won the series 2-1.

Before the final game in Mackay, Australia's ODI form made for grim reading. They had lost seven of their past eight ODIs.

In the opening two games of the series, only Mitch Marsh and Josh Inglis were able to pass the 50-run mark, with Marsh doing so in game one and Inglis in the second.

Cameron Green (35 in game two) and bowler Ben Dwarshuis (33 in game one) were the next highest scores. Before the final game, Australia's batting left much to be desired.

What then are we to make of this series for Australia?

Australia still has capable ODI batters

HYDERABAD, INDIA - SEPTEMBER 25: Cameron Green of Australia celebrates after scoring a fifty during game three of the T20 International series between India and Australia at Rajiv Gandhi International Stadium on September 25, 2022 in Hyderabad, India. (Photo by Pankaj Nangia/Getty Images)

It may have taken a while for the Aussie batters to get going this series, but when they finally did in the final game, it was something to behold.

Not only was it the first time all top-three batters reached centuries, but Australia's batting total of 2/431 is their highest ODI score at home. 

Openers Travis Head (142 runs off 103 balls) and Mitch Marsh (100 off 106) combined for a remarkable 250-run opening partnership.

Head took on the South African bowlers and delivered a typically attacking innings. Marsh's innings, whilst less aggressive, was crucial in steadying the Aussies and setting an imposing target for the South Africans.

Somehow, Head and Marsh's opening heroics did not become the headline of the innings, however.

Coming in at first drop, Cameron Green powered his way to the second-fastest men's ODI ton hit by an Australian.

He hit eight sixes and 14 boundaries in total on his way to the milestone.

Green was playing with such confidence that he was turning down singles, even with the capable Alex Carey at the other end.

It proved to be a wise tactic, as at one stage Green turned down a single before hitting spinner Senuran Muthuswamy for three consecutive maximums.

Alex Carey also registered an unbeaten 50, helping Green on his way to the blistering ton. No Australian batter failed.

It should be noted that many first-team South African bowlers were missing. Nandre Burger and Lungi Ngidi were rested, whilst Kagiso Rabada remains injured.

Despite a concerning opening two games, Australia still has strong ODI batters. However, recent retirements do mean that there are some gaps in the line-up.

Steve Smith and Glenn Maxwell are yet to be properly replaced

ADELAIDE, AUSTRALIA - JANUARY 26: Steve Smith of Australia looks on before the start of game five of the One Day International series between Australia and Pakistan at Adelaide Oval on January 26, 2017 in Adelaide, Australia. (Photo by Morne de Klerk/Getty Images)

The fact that the top four batted so well meant that Marnus Labuschagne was shuffled down the order and wasn't needed.

Despite some impressive outfield catches, Labuschagne has once again had a series to forget. He only managed to score one run in each of the first two games of the series.

Earlier in the year, Steve Smith retired from the ODI format. Labuschagne, a similar player to Smith, was an obvious candidate to fill his shoes.

However, his poor form in the Test arena, which saw him dropped from that side, has continued in the 50-over format.

Meanwhile, it's unclear if the batting all-rounder vacancy left by Glenn Maxwell has been filled.

In the third ODI, Cooper Connolly was called in to the team in place of Aaron Hardie. Connolly, picked up 5/22 in defending Australia's total, the best spin-bowling figures for an Australian in a men's ODI. 

Connolly, like Labuschagne, was not needed with the bat, however.

Neither Connolly nor Hardie has impressed with the bat thus far in their ODI careers.

In three innings, Connolly averages just five runs in ODIs. In List A games, he averages 14.62 from nine innings.

Meanwhile, Hardie averages 15 from his 12 ODI innings and 17.77 from 26 List A innings.

Who, then, could the Australians call on to fill these gaps?

Matt Short was out injured this series. His ODI average of 21.53 isn't remarkable, but he has had more consistent performances domestically. He has a 32.36 average in List A cricket.

Sam Konstas, despite his vibrant and attacking style of play, has been more closely linked to the Test team but could potentially slot into the ODI side. Marsh and Head have succeeded in opening the batting, but could be shifted down the order to allow Konstas to open.

Konstas has only played three List A games, but he has already hit a century for NSW.

Tim David has become a regular in the T20 side, but has only played four ODIs in 2023. 

Despite not succeeding in that short stint, David has an impressive List A record, averaging 60.76.

That said, David has not played a 50-over game since 2023 and, as reported by ESPN, has "no plans" to expand his focus to one-day matches.

David's skills could be useful down the order in Australia's ODI set-up.

After their win, Cameron Green told the press that after the opening partnership, the end of Australia's batting innings became "a bit of a T20" with so many wickets in hand.

It's hard to think of any reason why David's T20 finishing skills would not be useful at the end of an ODI innings, particularly when other batters are offering so little.

Despite their recent victory, Australia's medium-term ODI form still isn't great.

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With a Cricket World Cup in two years, this may be cause for concern. However, Australia does have a tendency to show up at ICC tournaments. Before the 2023 ICC Cricket World Cup, Australia lost five of the six games leading into that tournament.

Of course, Australia ended up winning the World Cup nonetheless.

There will be a focus on T20 cricket in the coming months in the lead-up to the 2026 T20 World Cup. Australia's next games will be T20s in New Zealand early in October.

Australia will play India in a three-game ODI series at home, beginning on October 19.