The very idea of Cummins being on the chopping block was mystifying to legspinner Zampa, who was adamant there was no heat coming from within the team.
The win lifted Australia off the bottom of the World Cup standings before they take on Pakistan, who lie fourth, in Bengaluru on Friday.
Zampa said the mood had been "flat" in the changing room after the first two losses but things could change quickly.
"It's a World Cup, so get on a roll.
Reporting by Ian Ransom in Melbourne; Editing by Peter RutherfordOur Standards: The Thomson Reuters Trust Principles.
Persons:
Pat Cummins, Spinner Adam Zampa, Cummins, Pathum Nissanka, Kusal Perera, David Warner, Perera, Wellalage, Michael Clarke, legspinner Zampa, Zampa, what's, Travis, Mitchell Marsh, Ian Ransom, Peter Rutherford
Organizations:
South, Cummins, Sri, Australia, Pakistan, Thomson
Locations:
Sri Lanka, India, South Africa, Australia, Pakistan, Bengaluru, Sri, Bangalore, Melbourne