It was her seventh championship this year -- four of which were LPGA events. She won the LPGA Championship in June and her title defense at the British Open gives her -- at age 22 -- five major tournament championships.
Only two of the Top 10 women's golfers finished in the Top 10 at Carnoustie, Scotland. Tseng won and No. 5-ranked Choi Na-yeon ended up tied for seventh.
Ai Miyazato missed the cut last week and dropped one spot in the ranking to seventh. Kim In-kyung moves into the No. 6 place.
Tseng has a rankings points average of 16.20, overshadowing the 11.77 average of No. 2-ranked Cristie Kerr. No. 3 Suzann Pettersen (10.94) is the only other golfer with a average more than 9.5.
Jiyai Shin (9.45 average) is fourth with Choi at 8.37. Kim's average is 7.90 with Miyazato coming in at 7.82. Ahn Sun-ju (7.49) is eighth with Paula Creamer (7.28) and Karrie Webb (6.72) completing the Top 10.