"It was a very good wicket to bat on (when we batted) to be honest with you. First of all I must say it was a very good toss to win. The new ball tends to do a lot here. Credit must go to our bowlers who utilised the conditions brilliantly.
"I would actually say our bowlers won this match for us. To restrict such a good batting line up in the first six overs and also get key wickets was a tremendous effort," said the left-handed West Indian power-hitter.
Gayle struck six towering sixes and five fours while notching his fourth 80-plus score in the tournament and sixth half-century.
RCB paceman R Vinay Kumar bowled a devastating first spell to reduce Mumbai to two for two by sending back opener James Franklin and Rohit Sharma