However another round of heavy downpour delayed the proceedings in the second over RCB's run-chase as they were two for no loss when the match was stopped.
When DD batted, De Kock hit nine fours and three sixes during his 39-ball-69 while Duminy decorated his 43-ball unbeaten innings of 67 with four boundaries and three huge hits over the fence.
If De Kock's innings was all about splendid batsmanship, Duminy's was elegance personified.
While De Kock blazed to his half-century in 30 balls, Duminy paced his innings splendidly and completed his half-century in 35 deliveries.
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Earlier, a decent opening stand of 55 was provided by openers De Kock and Shreyas Iyer (20 off 18 balls). Iyer was guilty of not getting to a big score after getting his eye in.
After the departure of Iyer, De Kock and Duminy combined forces to take the total to 110 in 11.2 balls at the packed Chinnaswamy stadium.
Initially, left-handed De Kock was the more aggressive of the two openers as he blazed through lifting the ball with great force on the leg side and cutting and driving in frontof the wickets for exquisite boundaries.
The diminutive South African batsman struck David Weise for a six and two boundaries off successive balls in ninth over of the innings.