Chris Gayle smashed 82 not out to lead Royal Challengers Bangalore to a nine-wicket win over the Mumbai Indians on Wednesday and top the list of run-scorers in the Indian Premier League this season. Gayle now has 515 runs to overtake Virender Sehwag (468) after hitting six sixes and five fours in 59 balls. Bangalore restricted Mumbai to 141-6 at Wankhede Stadium and then scored 142-1 in 18 overs. Gayle, who was dropped on 21 by West Indian compatriot Dwayne Smith off Harbhajan Singh, added 94 in an unbroken second-wicket stand with captain Virat Kohli (36 not out). He struck three consecutive sixes off left-arm spinner Pragyan Ojha and perfectly executed the pull shot off the pace bowlers. \"We knew we had to see off (Lasith) Malinga early on and then build the innings,\" Gayle said. \"We were expecting two overs upfront from him but he bowled three.\" Earlier, seamer Vinay Kumar and spinner Muttiah Muralitharan came up with timely wickets after Mumbai had been sent in to bat. Opener James Franklin (1) and Rohit Sharma (0) fell cheaply to Kumar. Franklin slashed at a delivery and was caught by Zaheer Khan at third man, while Sharma was trapped lbw three deliveries later as Mumbai was reduced to 2-2 in the second over. Sachin Tendulkar hit three successive fours off Kumar in his innings of 24, and Dinesh Karthik scored 44 from 39 balls to steady the innings. Muralitharan dismissed Karthik and Dwayne Smith in consecutive balls, but unbeaten cameos from West Indian allrounder Kieron Pollard (21 off 13) and captain Harbhajan Singh (20 off 12) took Mumbai to a competitive score. Pollard scored 18 off the last over from Kumar, smashing two sixes to the square-leg boundary. The win lifted Bangalore to fourth in the nine-team league with six wins, five losses and one no-result from 12 games. Mumbai remains third with seven wins and five losses from 12 outings. Bangalore 142-1 in 18 overs (Chris Gayle 82 not out, Virat Kohli 36 not out) beat Mumbai Indians 141-6 (Dinesh Karthik 44; Muttiah Muralitharan 2-24, Harshal Patel 2-24, Vinay Kumar 2-34).