Having already lost the series after three successive defeats, the visitors will be playing for pride when they take field at the Manuka Oval in the fourth ODI here tomorrow.
"If they learn from their mistakes they will stop it, yes," Shastri told reporters when asked if the bowling attack is good enough to prevent a whitewash.
Shastri though was critical of the inconsistent bowling attack in the last three games.
"So when that happens then you have a chance of beating the best side in the world. But there are no excuses for bowling wides, so obviously they will be disappointed and they have to put their best foot forward," said Shastri.
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"To apply finishing touch in close games, we need to bowl better and be consistent as a bowling unit. MS Dhoni mentioned in the press conference that there were too many easy boundaries. It's not that the batsman has to earn it but they are given like freebies. That should be eliminated. Even if you cut that by 60-70 percent, it will become an even tighter game," he added.
"There is absolutely no shame in the way they have played despite recent results. Because I know there is only one way to go after this tour of Australia and that's going up. I know what happened 12 months ago after the Test series and I know where we stand today as far as the Test team is concerned," said the former India all-rounder.
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"We need bench strength because this is one of the toughest tours. And I have been to Australia many times. In the last few days we have been through three time zones. And it's not often you go through that.
"You play in Perth, and you get on a flight and reach Brisbane where the time is different. Then to Melbourne where the time is different and all in the matter of six days. Now you consider all that and I think the boys have done extremely well," he said.
"But here when you travel that far, and suddenly you get injuries, I think it is something I will suggest. We need to have a bench-strength of atleast 7-8 bowlers have to be there all the time and there also there will be specialists for T20s, for ODIs and for Tests," he added.
Shastri also hinted about premier off-spinner Ravichandran Ashwin's to the playing XI after missing the action at MCG.
"Our strength is spin because if you have experience in this bowling department, it's in spin. So we went with that experience in the first game and then realised that we need more bases covered. We need that extra option of a bowler. And hence we played Rishi Dhawan and Gurkeerat Mann because it gave you an extra option," he said, explaining the previous selection decisions.
"And we have batted so well at the top that the opportunity has not been there for the lower order. But if and when there is a situation, there is the opportunity to chase, it will be the test. And I am sure he will be up for it.