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Smith and Warner's bans for their role in trying to alter the ball in South Africa expire late next month and they are widely expected to quickly return to the national set-up.
Paine said that Australia's much-vaunted pace attack hadn't used the bouncer effectively in their recent series loss to India.
India won the first and third Tests in Adelaide and Melbourne while Australia emerged victorious in the second match in Perth.
Paine said that they did get some plans wrong, but there was nothing as worrying as a disagreement.
Indian fan club Bharat Army came up with a witty chant to give it back to Australia for sledging Indian wicketkeeper Rishabh Pant, as he smashed a ton on Day 2 of the fourth Test match.
Despite the light-hearted press conference, Paine knows he has a mountain to climb on Saturday with India compiling a massive 622 for seven declared in Sydney.
Saker said both he and head coach Justin Langer had a heated discussion with the team after the end of day's play.
India have never won a Test series on Australian soil, but go into the series-finale starting Thursday with a 2-1 lead. The visitors need only a draw to claim a piece of history.
The 25-year-old was Australia's top performer with both the ball and the bat in the Boxing Day Test in Melbourne.
Off the field, being a gentleman, Rishabh Pant responded with a beautiful gesture as he met Bonnie Paine, Tim's wife and his kids.
During the optional session, leg-spinner Labuschagne, who is tipped to play in SCG was seen bowling to Queensland teammate Khawaja.
Tim Paine says in absence of Smith, Warner, his batsmen failed against top class Indian bowling attack
India beat Australia by 137 runs in the third Test to go 2-1 up in the four-match series and take giant strides towards winning their first ever Test series on Australian soil in seven decades.
WATCH | 'Have you ever heard of a temporary captain, Mayank', Rishabh Pant gives it back to Tim Paine
The Indian wicketkeeper was giving it back to Paine a day after the Australian joked about recruiting Pant to a Big Bash franchise, Hobart Hurricanes.
During India's second innings in Melbourne Test, Australia wicketkeeper-captain Tim Paine teased Rishabh Pant over his exclusion from the ODI squad.
Paine was caught on the stump microphone telling team-mate Aaron Finch that he would join Mumbai Indians IPL team if the stylish Indian hits a six at the MCG.