Defending a target of 181, Kings XI Punjab restricted Daredevils to 172 for 5 even as the Zaheer Khan led outfit looked set to get 44 off 4 overs, which was considered par for the course on a flat batting wicket.
While KXIP's third win does not change their position in the league table but certainly keeps them alive while Daredevils will rue a missed opportunity even though they stay put at third place in the table.
The 17th over bowled by Marcus Stoinis (3/40 in 4 overs) was an eventful one that saw the right-arm gentle medium pacer give only 4 runs gettimg Sam Billings (6) in the process.
In the last three overs, Daredevils needed 40 from last 3 overs.
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Carlos Brathwaite (12) hit a four and a six off Sandeep Sharma before providing a simple catch for the fielder stationed at mid-wicket boundary trying a pull shot.
Sandeep then kept his cool in the final over where 25 was needed and he gave only 15 runs.
De Kock was watchful for the first few deliveries before hitting his first boundary off spinner KC Cariappa, sweeping him to the square leg boundary. In the next over, he smashed Mohit Sharma over extra cover for another boundary.
When Stoinis was introduced into the attack, De Kock was quick to cut him and then drove him through the covers for back to back to boundaries.
The 50 runs came in the final over of Powerplay as Sanju Samson smartly nudged around for the singles to give De Kock the bulk of the strike.
He used the sweep and cut shot to good effect against the spinners -- Cariappa and Patel to hit them for boundaries.
De Kock's own 50 came off 28 balls with a lustily pulled six off Stoinis. But he did not last long after that as he tried to slash a Stoinis slower only to be caught at backward point. De Kock's 52 off 30 balls had six boundaries and two sixes as the opening stand yielded 70 runs.
In the 14th over, Samson picked up Stoinis to pull him and then hit him thriough vacant extra cover to reach 49 before indiscretion cost him his wicket.
He tried to hit Stoinis for a six after the two boundaries only to be caught by Glenn Maxwell at long-on. Samson's 49 off 35 balls had four boundaries and a six.
The Samson-Karun duo added 51 runs for the second wicket as another 61 runs were required for victory.