Yani Tseng (Chinese: 曾雅妮 Zēng Yǎní; born 23 January 1989) is a Taiwanese professional golfer playing on the U.S.-based LPGA Tour. She is the youngest player ever, male or female, to win five major championships and was ranked number 1 in the Women's World Golf Rankings for 109 consecutive weeks from 2011 to 2013.