The South African moved up two notches to 19th after coasting to the win Sunday with three straight bogeys. Despite the horrid finish, it was enough for Immelman to defeat Justin Rose by a stroke.

Tiger Woods remained in first, followed by Phil Mickelson, Jim Furyk, Steve Stricker and Ernie Els. Adam Scott held the sixth spot for another week.

Rose climbed one spot to seventh, while British Open champion Padraig Harrington dipped one to No. 8. Vijay Singh and K.J. Choi rounded out the Top 10.

Finishing the Top 20 are: Rory Sabbatini, Geoff Ogilvy, Sergio Garcia, Angel Cabrera, Zach Johnson, Henrik Stenson, Luke Donald, Aaron Baddeley and Niclas Fasth.

Ian Poulter fell out of the rankings this week.