Australia will have to guard against the "thorn in their side" Cheteshwar Pujara and a "back at his best" Virat Kohli if they are to counter India in the World Test Championship final at The Oval next week, feels legendary cricketer Ricky Ponting.

India's Test batting mainstay Pujara could provide valuable insights to his teammates, having played extensively at Sussex in the English County Championship, while Kohli is at his absolute best having cracked two centuries and six half-tons for Royal Challengers Bangalore in the recently-concluded Indian Premier League.

"The Australian team will be talking about Virat, no doubt about it, and they'll be talking about Pujara. They're the two," Ponting said on 'The ICC Review'.

Pujara is known to relish the challenges thrown at him by Australian bowlers, having scored more Test runs and centuries against them than any other side, and his contribution would be crucial to India's chances of lifting the WTC trophy in their second attempt.

"Pujara has been a thorn in their side a lot in the past, and in Australia, and this wicket will potentially be a lot more like an Australian pitch. They know that they'll have to get him early," opined the former Australian captain.

Pujara, who bats at No. 3, has 2,033 runs and five centuries in 24 Tests against Australia, and skipper Rohit Sharma will hope he makes a couple of more vital contributions for the side in the WTC final.

Kohli, apart from his sparkling form in the IPL, had smashed 186 in the fourth Test against Australia in March during the Border-Gavaskar Trophy and would be itching to have a go at the Pat Cummins-led side.

"They also know that Virat over the last few weeks is probably just about back to his absolute best, albeit in T20 cricket. He told me that the feeling he's getting right now is that he's almost back to his best, and that's an ominous warning for the Australians going into a one-off game," said Ponting.

Ponting is also mightily impressed with young Shubman Gill's performance in the IPL and the 23-year-old's exploits in the last two Tests of the Border-Gavaskar series.

Gill hit three centuries for Gujarat Titans in IPL.

"He looks like a terrific young guy. He's got that bit of attitude about him as well. He's got a bit of swagger. He has some serious class. That sort of front-foot pull shot that he plays against the fast bowlers will be a shot that he'll probably need against this Australian attack," said Ponting.

With the pace bowlers likely to do a lot of heavy lifting during the one-off Test, Ponting believes veteran Mohammed Shami will have to be at his absolute best against the strong Australian batting lineup, given that Jasprit Bumrah is not in the frame owing to injury.

"I think he has to step up or try and take his game to another level if India are going to win this game. When you talk to the Australian batters as well, they understand how good Shami is whether it's new ball or old ball, whether it's in Australia or India.

"They know the skillset he's got and how dangerous he can be. It's going to have to be him," added Ponting.

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