Tiger Woods, of course, remained No. 1 in the rankings and was followed again by Phil Mickelson, Ernie Els and Steve Stricker.
K.J. Choi moved up one spot to No. 5, dropping Adam Scott to sixth.
Justin Rose, Jim Furyk, Rory Sabbatini, Padraig Harrington, Vijay Singh and Henrik Stenson held onto their positions from 7-12. Luke Donald moved up one spot to 13th, knocking Sergio Garcia to 14th, and Stewart Cink was up one place to 15th, dropping Angel Cabrera to 16th.
Geoff Ogilvy, Aaron Baddeley, Zach Johnson and Lee Westwood rounded out the top 20 in the same positions they held last week.