Debutant Moises Henriques has played a brave hand of 75 not out in Australia's second innings of 9-232 to give the tourists an overall lead of 40 after day four of the first Test against India.
Offspinner Ravi Ashwin claimed 5-90 after his seven-wicket haul in Australia's first innings.
Henriques, who hit 68 in Australia's first dig, has added 57 for the 10th wicket with Nathan Lyon who is eight not out.
While top-order batsman Phil Hughes (six and duck) will need to lift to retain his spot throughout the four-Test series, it's Australia's bowling attack which will come under most scrutiny after conceding 572 including MS Dhoni's explosive knock of 224.
Trailing by 192 runs on the first innings, Australia had looked headed for an innings defeat at 9-175 before Lyon and Henriques fought back in a gritty display.
Shane Watson (17) was caught at slip off the bowling of Ashwin on the last ball before lunch after being promoted back to opening because of David Warner's gastro complaint.
Ed Cowan (32) was furious after being given out lbw to Ashwin at 2-64 and Hughes made a third-ball duck, caught at slip to a fizzing delivery from left-arm spinner Ravindra Jadeja.
Warner (23) fell lbw to offspinner Harbhajan Singh and Matthew Wade (eight) was bowled by Harbhajan after missing a slog-sweep attempt.Skipper Michael Clarke - the hope of the side after his 130 in the first innings - was lbw to Ashwin in the first over after tea for 31.
Taildenders Peter Siddle (two), James Pattinson (11), Mitchell Starc (eight) departed in quickly on a crumbling red-clay pitch.
India had resumed on Monday on 8-515 and Dhoni advanced his score from 206 to 224 before becoming one of five victims for pace bowler Pattinson (5-96).Offspinner Lyon's 3-215 from 47 overs was the equal-second highest tally of runs conceded in an innings for an Australia bowler in Test history.
The second Test is set to go ahead as planned in Hyderabad on Saturday despite twin bomb blasts which killed 16 and injured 117 people last week.
Australia announced on Monday that reserve quick Jackson Bird would be sent home because of a back injury.
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