Feng finished two strokes ahead of four players, including Top 10 golfers Stacy Lewis and Suzann Pettersen, in winning the Wegman's LPGA Championship in Pittsford, N.Y. The Locust Hill Country Club played tough. Feng's final round of 5-under 67 was her only one under 70 and she was 6-under for the tournament.
Feng has three victories on the LPGA of Japan Tour and one on the Ladies European tour, with three of her wins coming since March.
That boosts her to fifth in the rankings, a week after she ended the Top 10 at No. 10.
World No. 1 Yani Tseng, with a rankings points average of 16.81, topped a total score of 300 for the first time in her career and tied for 59th. Choi Na-yeon, last week's No. 2, was disqualified after failing to sign her scorecard after the final round Sunday, and drops to No. 3 at 7.82.
That allows Lewis (8.24) to get to the No. 2 ranking while Pettersen (7.69) goes from fifth to fourth. Feng's average is 7.66.
Ai Miyazato, despite tying for sixth Sunday, goes from fourth to No. 6 with an average of 7.41. Ahn Sun-ju (6.75) and Christie Kerr (6.65) are both down one place this week to seventh and eighth, respectively. Kim In-kyung remains No. 9 at 6.19 and Jiyai Shin drops from No. 8 to 10th at 6.13.