Philadelphia, PA (SportsNetwork.com) - Jordan Spieth followed his Australian Open win with a victory at the Hero World Challenge on Sunday and that helped him improve to No. 9 in this week's world rankings.

Spieth moved from 14th to 11th with his Aussie Open victory, and he inched up two more spots this week after a dominating 10-shot win at Isleworth.

Rory McIlroy remained the No. 1 player in the world and was again followed by Henrik Stenson, Adam Scott and Bubba Watson.

Justin Rose shared sixth place behind Spieth and that helped Rose inch up one notch to No. 5. That pushed Jim Furyk down a spot to sixth. Sergio Garcia and Jason Day were seventh and eighth again this week.

Rickie Fowler and Matt Kuchar moved down one spot each to 10th and 11th with Spieth's move to No. 9.

Phil Mickelson, Martin Kaymer, Billy Horschel, Graeme McDowell, Hideki Matsuyama and Victor Dubuisson remained 12th through 17th.

Zach Johnson and Dustin Johnson exchanged places with Zach up to 18th. Chris Kirk rounded out the top 20 again this week.

Danny Willett won the Nedbank Challenge and he climbed from No. 84 to No. 56, while Padraig Harrington won the Asian Tour event and he soared 125 places to No. 260 in the updated rankings.