Woods remains comfortably in first with Ernie Els in second.
Duval had been the number-one player but was unseated by Woods over a year ago. Phil Mickelson jumped to third a few weeks ago but dipped to fourth this week.
Lee Westwood, Colin Montgomerie and Davis Love III came in fifth, sixth and seventh, respectively.
Hal Sutton, Vijay Singh and Tom Lehman round out the top-10.
Sweden's Jesper Parnevik moved up one to 11th while Darren Clarke fell to 12th. Nick Price held on to his 13th ranking from last week.
Michael Campbell of New Zealand and Jim Furyk switched places this week with Campbell moving to 14th and Furyk falling to 15th.
Sergio Garcia came in 16th this week followed by Stewart Cink and Justin Leonard.
John Huston moved up one to number-19 while Thomas Bjorn slipped one to 20th.