South Korea's Ji Eun-hee will try to defend her title against a strong field at the $2-million Wegmans LPGA event which is celebrating its 33rd year at the Locust Hill Country Club.

The 23-year-old Ji will be hoping to get back on the winning track as she has finished no higher than sixth place in 2009.

Last year she collected her first winner's cheque ($300 000), firing a final round five under 67. She had to hold off five-time tour winner and runner-up Suzann Pettersen to do it.

"I have already delivered the one win," she said. "Going from one to two? I feel better with this type of pressure than not winning a tournament at all."

A total of 17 of the top 20 money winners will compete at Locust Hill course.

World number two Yani Tseng, third-ranked Paula Creamer, number four Shin Jiyai, fifth-ranked Cristie Kerr, eighth-ranked Kim In-kyung, number nine Helen Alfredsson and 10th-ranked Karrie Webb are those representing the top-10 positions in the tour's Rolex Rankings.

Shin, Webb, Kerr and Tseng are still seeking their first wins of the 2009 season.

A win for Ji would be her second in her third year on the tour.

"I got a new driver, and I modified my swing a little," said Ji. "And my weakness is my putting. Big problem."

The field also features rising Swedish star Anna Nordqvist, who won this month's major, the LPGA Championship.