Duval jumped up four places to No. 17 this week after the former No. 1 player in the world fell out of the top 20.
Tiger Woods, who finished eighth in Japan, remained comfortably in first place for the 171st consecutive week. Woods, who will take part in both the PGA Grand Slam of Golf and The Skins Game this week, has been in first place for a total of 241 weeks.
Phil Mickelson, who will take part in The Skins Game, held on to second place followed by 2002 British Open champion Ernie Els. Sergio Garcia and Retief Goosen switched places from last week with the Spaniard moving to fourth and Goosen falling to No. 5.
David Toms and Vijay Singh remained in sixth and seventh, while Padraig Harrington, who won the European Tour's Asian Open last week, came in eighth place.
Davis Love III and Colin Montgomerie rounded out the top 10.
Chris DiMarco moved up two spots to 11th while Nick Price stayed in 12th. Jim Furyk dipped two places to 13 and Angel Cabrera took the 14th slot. Germany's Bernhard Langer remained in 15th and Scott Hoch climbed three notches to No. 16.
Duval took 17th as Justin Leonard kept the 18th position. Bob Estes dropped two rungs to 19th, while Michael Campbell, who fell four places, completed the top 20.