India survived a late wobble to chase down a target of 155 and complete a 4-0 Test series whitewash over Australia in Delhi.
Opening batsman Cheteshwar Pujara struck 82 not out to lead India to a six-wicket victory in the evening session on day three.
Australia opened the bowling with their two spinners, Nathan Lyon and Glenn Maxwell, who made the breakthrough by bowling Murali Vijay (11) in the fourth over.
Pujara and Virat Kohli put on 104 for the second wicket at five-an-over before the home side stumbled with the winning line in sight.
Lyon (2-71) won lbw verdicts against Kohli (41) and Sachin Tendulkar (1), and Maxwell (2-54) had Ajinkya Rahane (1) caught in the deep to reduce India to 128-4, still requiring 27 runs.
But Pujara, who hit 11 fours in his 92-ball knock, was joined by his skipper Mahendra Singh Dhoni (12no) to finish the job without further alarm.
Australia have lost their last seven Tests on Indian soil and the result was only the second time they have suffered a whitewash in a series of more than three matches; the previous occasion came in South Africa in 1970. Their next Test action is the Ashes series in England, starting at Trent Bridge on July 10.
Wickets had tumbled throughout the first session; India extended their first innings from an overnight 266-8 for only 13 balls before they were all out for 272, a lead of 10.
Lyon took both wickets to fall - bowling Ishant Sharma and having Pragyan Ojha lbw with successive deliveries - to complete career-best figures of 7-94.
With the Feroz Shah Kotla pitch offering lavish turn and bounce, Australia decided to take an aggressive approach to their second innings and promoted Maxwell to open with David Warner.
The ploy did not work as Australia's top order - not for the first time in the series - collapsed to leave them on 89-5 at lunch.
Peter Siddle again waged a lone battle for the tourists. He slammed seven fours in his 45-ball 50, adding a second half-century to his maiden effort in the first innings - the first time in Test history a No 9 has top-scored for his team in both innings.
Left-arm spinner Ravindra Jadeja finished with 5-58, his maiden Test five-wicket haul, as Australia were all out for 164 all out in mid-afternoon.