Clark claimed the Australian Open and jumped 14 places to No. 28 in the world, while Sterne won the Alfred Dunhill Championship to leap 39 places to 74th.
Tiger Woods remained No. 1 and was again followed by Sergio Garcia, Phil Mickelson, Padraig Harrington, Vijay Singh and Robert Karlsson.
Camilo Villegas and Henrik Stenson exchanges spots with Villegas up to seven. Ernie Els held on to the ninth spot and was trailed by Lee Westwood, Geoff Ogilvy, Anthony Kim, Jim Furyk, Steve Stricker and Stewart Cink.
Kenny Perry moved up one to 16th and bumped Adam Scott to No. 17. K.J. Choi and Justin Rose remained 18 and 19 respectively, while Trevor Immelman was up two to 20th. His moved knocked Miguel Angel Jimenez down to 21.