De Kock, who is hailed as one of the best T20 batsmen of the world, looked absolutely clueless against that delivery from Starc.
Yadav stands just above five feet and is one of the shortest cricketers in the world.
Starc, who has 354 runs in ODIs, including a half-century was promoted up the order against India in the third ODI.
India's top-order batting force will be steered by the likes of KL Rahul, Shikhar Dhawan, Virat Kohli and KL Rahul.
Starc didn't generate much swing while Cummins moved the new ball from the word go.
All the key stats and numbers ahead of the Wankhede ODI between India and Australia.
Fast bowling is once again the flavour of International cricket and the latest ICC Test rankings for bowlers testify it to the hilt.
Micthell Starc took nine wickets in the series opener against New Zealand
Mitchell Starc was awarded the Man of the Match for his exceptional match figures of 9/97.
No decade has been as eventful as this one in ODI history.