India have continued their struggles with the Decision Review System in the second Test against Australia, despite coach Anil Kumble's pre-match assertion that it was not a problem his side needed to work on.

Virat Kohli's hopes of lifting the Border-Gavaskar trophy will end if Australia manage to win in Bangalore and take a 2-0 lead in the four-Test series.

Australia edge ahead on tense day two

Kohli will lament fielding errors and batting collapses if such a result unfolds, but the skipper's ineffectual use of DRS may also be on his mind.

Australia will resume at 6-237 on day three, holding a 48-run lead after once again putting their referrals to much better use than India.

By the time the second new ball was two overs old, India had already wasted their allotted two reviews.

Ravichandran Ashwin convinced Kohli to refer two not-out decisions, but the world's top-ranked Test bowler was thwarted by the technology on both occasions.

Quick Single: Aussies edge ahead on tense day two

A vociferous lbw shout was shot down when footage confirmed Shaun Marsh edged the ball onto his pads. Ashwin was convinced Matthew Wade gloved a ball before it ballooned off his chest, but replays appeared to show a gap between ball and glove.

Marsh, who scored 66, would have been dismissed for 14 had Kohli opted to review an earlier caught-behind shout.

Kohli has have lodged over 40 reviews since the start of the England series, when India's stern resistance to adopt the DRS ended. Some 34 have been struck down.

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"We have been working on it, at times there were close calls and we didn't get it right," India's Cheteshwar Pujara said.

"There was one instance where Shaun Marsh was out and we didn't take the review, we were not sure and we got it wrong.

"We are working on it and can get better at DRS."

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Injured opener Murali Vijay shared similar words last week, but Kumble was fiercely defensive when asked about India's DRS problems in Pune.

"I don't think we messed it up," Kumble quipped, prior to the start of the second Test.

"You can always have hindsight ... but those calls were really close, so I don't see a reason why we need to worry too much about that."

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Marsh was given out on 44 but successfully reviewed his lbw dismissal, while Steve Smith used a referral to help Nathan Lyon bag the sixth of his eight wickets on day one in Bangalore.