Chasing a target of 171, MI chased down the target in 18 overs with Rohit scoring 62 off 44 balls and Kieron Pollard hitting an unbeaten 40 off 19 balls.
Earlier RCB scored 170 for seven after being put into bat by Mumbai Indians with Australian left-hander Travis Head top scoring with 37 while young sensation Sarfaraz Khan smashed 28 off 17 balls.
Brief Scores: RCB 170/7 in 20 overs (Travis Head 37, Virat Kohli 33, AB de Villiers 29, Sarfaraz Khan 28, Jasprit Bumrah 3/31, Krunal Pandya 2/27)