Published: Aug 31, 2011 1:48 AM EDT
Updated: Aug 31, 2011 6:30 AM EDT

MELBOURNE, Australia (AP) - Golf Australia says world No. 1 Yani Tseng will defend her Australian Open title at Royal Melbourne in February.

Tseng has committed to the Feb. 9-12 championship, setting up a contest with Australia's Karrie Webb who will attempt to win the Open for the fifth time.

The women's Open will be played for the first time on Royal Melbourne's composite layout, ranked among the best courses in the world. Tseng won the Open for the past two years at Melbourne's nearby Commonwealth course.