An eventful series is speeding towards a dramatic conclusion on day three, after 30 wickets were taken in fewer than seven sessions of the decisive fifth Test.
India lasted fewer than 45 minutes on day three, losing their last four wickets for the addition of only 16 runs and a total of 157 - 161 runs ahead of Australia.
Washington Sundar is bowled by Pat Cummins early on day 3. (Dan Himbrechts/AAP PHOTOS)
Back-up paceman Boland (6-45) confirmed the second five-fer of his Test career when Mohammad Siraj edged him to Usman Khawaja in the slips for the ninth wicket around 40 minutes after the restart on Sunday.
Boland has made use of an atypically green SCG wicket, finding plenty of movement en route to 10 wickets for the game - and a headache for selectors ahead of the upcoming Sri Lanka tour.
The softly-spoken Victorian has never taken as many in a match during 13 Tests for Australia.
In encouraging signs for India, stand-in captain Jasprit Bumrah managed to bat after leaving the SCG with back spasms on day two and sending a scare through the Indian camp.
He had little chance to showcase his movement, having gone for scans on Saturday; India's innings was over when Boland bowled him after three deliveries.
India were into the bowlers only 10 minutes after play began on Jane McGrath Day, the pink crowd in raptures when Ravindra Jadeja clipped Pat Cummins to Alex Carey behind the stumps.
Bharat Army supporters were out in force at the SCG again on Sunday. (Dan Himbrechts/AAP PHOTOS)
Captain Cummins (3-44) then collected Washington Sundar's middle stump to signal the end was nigh for the tourists.
Should Australia lose in Sydney, India will draw the series 2-2 and retain the Border-Gavaskar Trophy, having won the last four Test series between the two cricketing powerhouses.
A defeat would also leave Australia relying on results during their upcoming tour of Sri Lanka to confirm a spot in the World Test Championship Final over winter.
