Combined effort from the Indian bowlers helped the side bowl out Australia for 199 after the hosts opted to bowl first in their ODI World Cup campaign opener in Chennai.
Ravindra Jadeja scalped three wickets while Kuldeep Yadav and Jasprit Bumrah picked two each.
Mohammed Siraj, Ravichandran Ashwin and Hardik Pandya also got one wicket each.
Australia never got going in the innings as Indian bowlers kept clicking with wickets at regular intervals.
Playing XIs
India: Rohit Sharma (c), Ishan Kishan, Virat Kohli, Shreyas Iyer, KL Rahul, Hardik Pandya, Ravindra Jadeja, Ravichandran Ashwin, Kuldeep Yadav, Jasprit Bumrah, Mohammed Siraj
Australia: David Warner, Mitchell Marsh, Steven Smith, Marnus Labuschagne, Glenn Maxwell, Alex Carey, Cameron Green, Pat Cummins (c), Mitchell Starc, Adam Zampa, Josh Hazlewood
Source: NDTV