India retained the Border-Gavaskar Trophy with a 6-wicket win in Delhi.
Rohit Sharma's men chased down the 115-run target inside 27 overs to go 2-0 up in the 4-match series.
While KL Rahul once again failed with the bat, Rohit Sharma scored a quickfire 31 off 20 balls to set the tone before he was run out.
Virat Kohli too looked good, becoming the 6th batter to score 25,000 international runs and the fastest to reach the landmark. However, he was stumped for 20 off Nathan Lyon's bowling.
Iyer also departed in search of quick runs but Cheteshwar Pujara & KS Bharat ensured there were no more hiccups for the hosts.
Earlier, Australia were bowled out for just 113, having lost 9 wickets for 48 runs with Ravindra Jadeja picking up his career-best 7/42.