India insist one horror day won't ruin their summer and claim they'll be able to rebound quickly against Australia in Rajkot on Friday.
The hosts' 10-wicket embarrassment to the Aussies was just the second time they have been beaten at home by that margin in their history.
Out-performed with bat and ball, they bowled particularly poorly against an Australian side who enjoyed their best game of one-day cricket in recent memory.
But Shikhar Dhawan - who provided a rare bright spark with 75 - insisted his team had been beaten but not broken in the flogging.
"It's just one bad day at office," Dhawan said.
"We just analysed where we went wrong and mentally we work on.
"It's a new day, so get ourself back and get the positivity going. We guys have been playing very good cricket the whole year, so one bad day in office fine.
"We know we are a strong team and we will get back stronger."
After they lost 4-30 in the middle overs to halt their momentum with the bat, the hosts were altogether sloppy in the field.
While David Warner and Aaron Finch both batted superbly for their centuries as they chased down 256 with 74 balls to spare, India were their own worst enemies.
They gave away 20 extras in the innings, including nine wides in a tough night in the field.
They also offered far too much width to Aaron Finch, and struggled to find their lengths to both batsmen.
Problems that must be fixed for the final two games of the series in Rajkot on Friday ad Bengaluru on Sunday.
The hosts could also have further problems headed into Friday's match, with wicketkeeper Rishabh Pant nursing a suspected concussion.
He did not keep wicket in the second innings in Mumbai after being hit by a Pat Cummins bouncer, with KL Rahul filling in.
He will be monitored ahead of the second game in the series.
Australian Associated Press