Third Test, Perth: India 330 & 52-1 v Australia 212 (stumps, day two)
Singh strikes for one of his four wickets, as India dominate
India seized control of the third Test after bowling out Australia for 212 and then reaching 52-1, for a lead of 170.
RP Singh took 4-68 on the second day in Perth as Australia were reduced to 61-5 at one stage before Andrew Symonds and Adam Gilchrist shared a century stand.
India captain Anil Kumble became only the third man to take 600 Test wickets when he dismissed Symonds for 66.
Kumble also had Shaun Tait caught as Australia conceded their biggest first innings deficit at home since 2004.
And India's opening batsman Virender Sehwag was in no mood to let the Aussies back into the match as he hit some searing boundaries late in the day to finish on 29 not out.
The tourists' success put serious pressure on Australia's ambitions of setting a new world record by winning 17 Tests on the bounce, having equalled it by winning the second game of the four-match series in Sydney.
India began the day on 297-6 and Mahendra Dhoni and Irfan Pathan took the score along to 328 before the morning session suddenly burst to life.
Stuart Clark triggered a collapse when he trapped Dhoni lbw for 19 with a ball that hit the batsman above the knee roll on the front foot.
And the following over saw the end of Pathan's important innings of 28, when another dubious lbw decision went in Australia's favour.
Mitchell Johnson's swinging delivery appeared to be disappearing down the leg-side, but umpire Billy Bowden sent Pathan on his way.
Kumble and RP Singh followed for one and nought respectively as India's last four wickets went down for two runs, with Johnson returning his best Test figures of 4-86 in only his fifth appearance.
On another hot day at the Waca, and India lacking an express pace bowler in their attack, it seemed conditions were ideal for Australia to reply with a big total.
But Singh, who was able to swing the ball throughout the innings, had other ideas and they were dismissed in just 50 overs.
New-ball partner Pathan claimed the the first two wickets, the first coming when debutant Chris Rogers was lbw as he played across his pads.
Kumble is congratulated by Gilchrist after taking his 600th wicket
It was the third contentious lbw in the day and the fourth of the match.
Phil Jaques was caught at second slip two balls later as he edged an attempted cover drive and Michael Hussey followed for a duck when another loose drive gave Singh his first success, with Dhoni taking the catch behind the stumps.
Ricky Ponting and Michael Clarke nursed Australia to lunch at 22-3 but soon after the re-start youngster Ishant Sharma removed both, Ponting (20) fending a catch to third slip and Clarke (23) coming gingerly forward and edging to Dhoni.
Things could have got even worse for Australia, but Sachin Tendulkar dropped Symonds at slip on three and the big all-rounder from Queensland made India pay with some fearsome driving and a no-nonsense biff down the ground for six off Kumble.
Symonds and Gilchrist (55) scored quickly in a stand of 102 either side of the tea interval and India needed a lucky break to end the partnership when Symonds edged Kumble to Dhoni.
The wicket-keeper could not take the chance but it bounced up to Rahul Dravid at slip and India were back in charge.
It was one of those days where it felt like we nicked everything and they played and missed everything
Singh picked up the next three wickets as Gilchrist, Brett Lee and Clark all edged to Dhoni - the catch that ended Lee's innings on 11 was a particularly good one - but Johnson and Tait added 17 for the final wicket before Kumble picked up wicket number 601.
India had 11 overs to bat before the close. Sehwag and Wasim Jaffer almost got them through to stumps unscathed, but Clark had Jaffer caught in the gully with barely 10 minutes left in the day.
But it still left India in excellent shape to become the first touring team in nine years to win Perth.
India captain Anil Kumble:
"RP and Irfan started off and picked up those three wickets and that changed the momentum in our favour.
"It is important to take the momentum forward and ensure that we have a good day tomorrow.
"If we do that then obviously we have a great chance to win this Test match."
Australia vice-captain Adam Gilchrist:
"We didn't play well. We started the day well and then we just handed it back to them.
"A swinging ball anywhere in the world definitely gives you something extra to contend with and they definitely did that well.
"They bowled very well. It was one of those days where it felt like we nicked everything and they played and missed everything. They've done well, they've dominated."