Woods suffered a two-stroke penalty in the final round of the Wachovia Championship that dropped him into a tie for 11th. Woods currently has 13.06 points in the ranking, while Singh is right behind him with 12.88.
Ernie Els stayed put at No. 3 followed by Retief Goosen and Phil Mickelson. Chris DiMarco exchanged positions with Adam Scott to come in at No. 6 this week.
Sergio Garcia, who was eliminated on the first playoff hole at the Wachovia Championship, improved one spot to No. 8. Padraig Harrington dropped to No. 9, while David Toms completed the top 10.
Stewart Cink remained at No. 11 and Luke Donald switched spots with Mike Weir, with the Englishman moving to No. 12 and the Canadian falling to No. 13. Darren Clarke was up one to No. 14 and Kenny Perry climbed to No. 15.
Davis Love III plunged two positions to come in at No. 16 this week followed by Stuart Appleby. Jim Furyk lost to Singh on the fourth playoff hole on Sunday, but the runner-up finish was good enough to vault the former U.S. Open champion from No. 26 to No. 18.
Miguel Angel Jimenez and Chad Campbell each dropped one spot to round out the top 20.
K.J. Choi titled last week at the SK Telecom Open in South Korea. The victory moved him to No. 27 in the world. On the European Tour, Steve Webster earned his first career win at the Telecom Italia Open and rocketed from No. 228 to No. 140.