Shardul Thakur (68 off 29 balls) and opener Rahmanullah Gurbaz (57 off 44 balls) cracked half-centuries while Rinku Singh scored a 33-ball 46 as KKR made a fine recovery from 89 for five to post 204 for seven.
Leg-spinner Varun Chakravarthy (4/15) and young Suyash Sharma (3/30) did the maximum damage as KKR dismissed RCB for 123 in 17.4 overs.
For RCB, left-arm pace bowler David Willey and leg-spinner Karn Sharma took two wickets each.
Brief scores:
Royal Challengers Bangalore: 123 in 17.4 overs (Virat Kohli 21, Faf du Plessis 23, Michael Bracewell 19; Varun Chakravarthy 4/15, Sunil Narine 2/16, Suyash Sharma 3/30).
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Mumbai (PTI): Ryan Rickelton's whirlwind unbeaten ton was overshadowed by Heinrich Klaasen's unbeaten 65 as Sunrisers Hyderabad defeated Mumbai Indians by six wickets in an IPL match here on Wednesday.
Chasing an imposing 244-run target, Travis Head (76 off 30) and Abhishek Sharma (45 off 24) shared 129 runs for the opening wicket to set the platform for SRH.
Klaasen (65 not out off 30 balls) then displayed his all-round hitting abilities to guide SRH home with the help of Nitish Kumar Reddy (21) and Salil Arora (30 not out off 10) in 18.4 overs.
Earlier, Rickelton's knock powered MI to 243 for five.
MI rode on a 93-run stand between Rickelton (123 not out off 55 balls) and Will Jacks (46 off 22) in 7.1 overs for the opening stand to power the side.
MI skipper Hardik Pandya scored a valuable 31 off 15 balls before being dismissed.
Praful Hinge (2/54), Eshan Malinga (1/29), Sakib Hasan (1/39) and Nitish Kumar Reddy (1/31) were the wicket-takers for SRH.
Brief Scores:
Mumbai Indian: 243 for 5 in 20 overs (Ryan Rickelton 123 not out; Praful Hinge 2/54).
Sunrisers Hyderabad: 249 for 4 in 18.4 overs (Travis Head 76, Heinrich Klaasen 65 not out; AM Ghazanfar 2/51).
