Philadelphia, PA (SportsNetwork.com) - Lydia Ko earned her first professional win at the Swinging Skirts World Ladies Masters on Sunday to move to No. 4 in this week's world rankings.
The 16-year-old was playing in just her second event as a professional after winning four times as an amateur. Her 3-stroke victory over So Yeon Ryu jumped her a pair of places from sixth last week.
The top three players remained the same, with Inbee Park being followed by Suzann Pettersen and Stacy Lewis.
Ryu stayed in fifth behind Ko, while Shanshan Feng fell two spots to sixth. Na Yeon Choi, Karrie Webb, Lexi Thompson and I.K. Kim again rounded out the top 10.
The next 10 spots also remained the same as Catriona Matthew, Cristie Kerr, Paula Creamer, Jiyai Shin, Amy Yang, Angela Stanford, Hee Young Park, Ai Miyazato, Beatriz Recari and Lizette Salas held firm from 11 through 20.