Na Yeon Choi won the season-ending CME Group Titleholders on Sunday and that helped her improve two spots to No. 2 in this week's women's world rankings.
For Choi, it was her second win of the year to go with her victory at the U.S. Women's Open.
Yani Tseng easily remained the No. 1 player and was followed by Choi. Stacy Lewis and Inbee Park both dropped a spot to third and fourth respectively.
Shanshan Feng and Suzann Pettersen flip-flopped positions with Feng up to fifth. Jiyai Shin remained seventh, while So Yeon Ryu inched up one to eighth, which bumped Ai Miyazato down to ninth.
Cristie Kerr was up one to 10 and that pushed Mika Miyazato down a notch to 11. Paula Creamer held steady at No. 12. Sun Ju Ahn and Amy Yang exchanged places with Ahn up to 13 and Yang down to 14th. Catriona Matthew remained No. 15 again this week.
Karrie Webb moved up one to 16 and pushed Azahara Munoz down to 17. Brittany Lincicome shared third behind Choi and that helped her jump two to 18th. Chie Arimura held steady at No. 19, while Angela Stanford tumbled a pair to 20th.