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18-year-old Lydia Ko wins Evian Championship to become youngest LPGA major champion

  • Lydia Ko, of New Zealand, follows her ball after playing on the 4th hole during the last round of the Evian Championship women's golf tournament in Evian, eastern France, Sunday, Sept. 13, 2015. (AP Photo/Laurent Cipriani)

    Lydia Ko, of New Zealand, follows her ball after playing on the 4th hole during the last round of the Evian Championship women's golf tournament in Evian, eastern France, Sunday, Sept. 13, 2015. (AP Photo/Laurent Cipriani)  (The Associated Press)

  • Lydia Ko of New Zealand, center, celebrates with Mi Hyang Lee of South Korea, left, and Lexi Thompson of the U.S, right, after winning the Evian Championship women's golf tournament in Evian, eastern France, Sunday, Sept. 13, 2015. (AP Photo/Laurent Cipriani)

    Lydia Ko of New Zealand, center, celebrates with Mi Hyang Lee of South Korea, left, and Lexi Thompson of the U.S, right, after winning the Evian Championship women's golf tournament in Evian, eastern France, Sunday, Sept. 13, 2015. (AP Photo/Laurent Cipriani)  (The Associated Press)

  • Lydia Ko, of New Zealand, follows her ball after playing on the 4th hole during the last round of the Evian Championship women's golf tournament in Evian, eastern France, Sunday, Sept. 13, 2015. (AP Photo/Laurent Cipriani)

    Lydia Ko, of New Zealand, follows her ball after playing on the 4th hole during the last round of the Evian Championship women's golf tournament in Evian, eastern France, Sunday, Sept. 13, 2015. (AP Photo/Laurent Cipriani)  (The Associated Press)

Lydia Ko became the youngest major champion in LPGA Tour history at the Evian Championship on Sunday.

The South Korean-born New Zealander closed with an 8-under 63 for a six-stroke victory over Lexi Thompson at the final major of the season.

Ko is 18 years, 4 months and 20 days old. She eclipsed the previous record of American Morgan Pressel, who was 18 years, 10 months and nine days old when she won the 2007 Kraft Nabisco Championship.

Ko, who was runner-up in Evian two years ago, stayed bogey-free and hit eight birdies in her final round.

Mi Hyang Lee, who had an overnight lead of one shot over Thompson, crumbled under pressure and finished tied for fourth place, nine strokes back.