|Tiger Woods of the U.S. holds up the trophy after winning the final round of the Chevron World Challenge PGA golf tournament with a birdie on the 18th hole in Thousand Oaks, California December 4, 2011. (REUTERS/Lucy Nicholson)
Tiger Woods' first victory since his 2009 scandal at the Chevron World Challenge on Sunday moved the former No. 1 up to 21st in this week's world rankings.
Woods rose 31 spots following the win despite it being an unofficial event with only 18 players in the field.
Luke Donald remained in first and Rory McIlroy held on to second. McIlroy won in Hong Kong and if he hadn't, No. 3 Lee Westwood, who claimed victory in Sun City, would have moved past him.
Martin Kaymer stayed in fourth, but Steve Stricker climbed one to fifth. Adam Scott also inched up one to No. 6, while Dustin Johnson sank two to No. 7. Jason Day and Webb Simpson kept their spots from last week with Matt Kuchar back in the top 10.
Nick Watney slipped one to 11th. Phil Mickelson, Charl Schwartzel, Graeme McDowell, K.J. Choi, Justin Rose and Sergio Garcia remained in their rankings from the week prior.
Hunter Mahan improved one to 18th, followed by Paul Casey, whose third-place result at the Chevron returned him to the top 20. Bubba Watson fell two to finish the top 20.