KL Rahul led the way in a superb match-winning partnership with Ravindra Jadeja as India prevailed by five wickets in the first ODI with Australia.
Despite reducing Australia from 129-2 to 188 all out, India looked in significant trouble at the Wankhede Stadium as their top order crumbled in reply.
They lost three wickets inside the first five overs and were 83-5 when Hardik Pandya fell to Marcus Stoinis.
But, on a pitch favourable to fast bowlers, Rahul (75 not out) and Jadeja (45 not out) masterfully guided India over the line to delight the Mumbai crowd.
It initially looked as if Mitchell Marsh might be the match-winner as he bludgeoned 81 off 65 balls for Australia, hitting 10 fours and five sixes.
However, after Jadeja drew a thick edge to end his innings, Australia never rediscovered their momentum, Mohammed Shami (3-17) ensuring their early platform was not built upon.
The swing of Mitchell Starc caused chaos as Australia sought to defend a disappointing total, Starc accounting for Virat Kohli (4), Suryakumar Yadav (0) and Shubman Gill (20).
Rahul counter-attacked with Hardik (25) for a stand of 44 but it was left-hander Jadeja who proved the perfect foil, their partnership one of supreme composure.
It was capped with a flourish, Jadeja getting India over the line with a pair of fours from an impressive but ultimately frustrated Starc as the hosts took a 1-0 lead in the three-match series.
Sensational Shami
The exit of Marsh provided an opening for the India attack, and it was one Shami made sure they took.
Dismissing both Cameron Green and Stoinis with length balls, he allowed just one four and a single six while bowling 30 dot balls from 66 deliveries, two of his six overs being maidens.
India end Mumbai misery
India had previously lost their last three men's ODI matches at the Wankhede, their longest run at the venue in the format.
That streak is now over, and India are a victory away from making it 14 wins in 15 multi-game bilateral men's ODI series at home.