Tiger Woods, who tied for 29th in his bid to win three in a row at the Deutsche Bank - SAP Open TPC of Europe, remained comfortably in first place. Ernie Els and Davis Love III held on to the second and third spots, respectively.
Singh jumped to fourth, followed by Masters champion Mike Weir. Phil Mickelson dipped two to sixth, which marked the first time Mickelson was out of the top- five since August of 2000. David Toms dropped one to seventh.
Padraig Harrington won a playoff against Thomas Bjorn in Germany and hopped up two notches to eighth. Retief Goosen finished third behind Harrington and Bjorn and climbed one rung to ninth. Jim Furyk slid down two places to round out the top-10.
Nick Price, the runner-up to Singh at the Byron Nelson, switched places with Sergio Garcia this week with the Hall of Famer moving to 11th and the Spaniard falling to 12th. Robert Allenby finished third in Texas and moved up three to 13th.
Justin Leonard, Chris DiMarco and Bob Estes each dropped one place to make room for Allenby's ascent up the rankings. Scott Hoch stayed pat at 17th while Jerry Kelly moved up two to No. 18.
Rocco Mediate and Charles Howell III fell one slot apiece and completed the top-20.