No. 1 ranked Tiger Woods, who has been idle since capturing his sixth career major championship at the Masters three weeks ago, is still comfortably ahead of Phil Mickelson, who is expected to play in the upcoming Compaq Classic of New Orleans.
The next six players also held their positions from last week, with Ernie Els, Lee Westwood, Colin Montgomerie, Vijay Singh, David Duval and Davis Love III rounding out the top-eight.
Els, Duval and Love are all in the field for the Compaq Classic. Westwood, whose lone PGA Tour triumph came in the New Orleans event in 1998, is still taking time off since the birth of his first child.
Northern Ireland's Darren Clarke jumped up one spot to ninth after collecting his first career win in Japan at the Chunichi Crowns. Houston Open winner Hal Sutton, who tied for 24th in his title defense at Greensboro, dropped back to the 10th position.
Canadian lefthander Mike Weir moved up from 13th to 11th place, one spot ahead of Jim Furyk. Jesper Parnevik of Sweden fell two spots to 13th.
Tom Lehman, Thomas Bjorn, Nick Price and Sergio Garcia remained in 14th, 15th, 16th and 17th, respectively, while Michael Campbell and Mark Calcavecchia swapped spots for the second consecutive week. New Zealand's Campbell returned to the 18th slot and Calcavecchia slipped to No. 19.
Ireland's Padraig Harrington, who held at least a share of the lead after each of the first three rounds of the Portuguese Open this past week but finished in a tie for second, held on to the 20th spot.
Phillip Price of Wales, who captured his second Portuguese Open title on Sunday, vaulted eight places to 55th in the rankings.
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