Earlier Mumbai bowlers vindicated their skipper's decision to bowl first as they bundled Kolkata out for 107 in 18.5 overs.
Karn's spell was founded on meticulous planning and excellent execution.
Bumrah with his quirky action set the cat amongst the pigeons snaring the risky Chris Lynn in the second over and leggie Karn rocked the Kolkata citadel snaring pinch-hitter Sunil Narine with his fourth delivery off the fifth over. The next ball was sacked on leg stump as well, and Narine had another crack, but only managed a leg bye. One feels, MSD needs more time in the middle to get his eye in.
In the fifth over, Narine attempted to break the shackles and charged out, not picking the googly, only to be stumped.
Sadly for the Indians, Washington Sundar returned fire-with-fire with only Parthiv Patel (52 off 40) standing up to be counted, leaving Mumbai mulling quite how to topple the Pune powerhouse. T20 is all about momentum. We lost too many wickets early on. He is a very good hitter straight. The difference between the top four teams, at least this year, has not been much. "That is what I did".
Gambhir and de Grandhomme fell off successive deliveries soon after and the Knight Riders found themselves staring at a below-par total. He had Gambhir holing out to deep midwicket with a slower legbreak, then off the next ball he pinged the back pad of de Grandhomme with a fast, fizzing wrong'un.
The fall of three Kolkata Knight Riders wickets in the powerplay overs, managing just 25 runs was a huge loss for Gambhir's side.
Suryakumar and Jaggi stemmed the fall of wickets, but runs continued to trickle.
The flawless execution of the variations by the MI bowlers only led to KKR's batting downfall.
But, once Jaggi was removed by Karn for 28, the collapse continued. Ishank Jaggi, the only KKR batsman putting up a fight, was beaten by flight, and ended up holing out to Mitchell at long on. KKR were 88 for 6 by the end of the 15th over and there was no way back for them.
Karn was named Man of the Match. Chawla defended the shot selection of some of the KKR batsmen.
KKR, who lost four out of seven matches in the latter half of the season, will have to play out of their skins to make it to the second qualifier. "I am just working hard when I am not playing".
Fleming said Mahendra Singh Dhoni has been one of the most successful players in world cricket and whose contribution as a senior player helped the Pune team in a big way during the current season.
Chasing 179 after good bowling from Krunal Pandya (3/24), Mumbai surprised KKR by sending Nitish Rana at No 3, and the Delhi batsman clobbered 50 off 29 balls to keep the chase running.