Lydia Ko claims Australian Open victory, Charley Hull seventh

Ko became the youngest world number one in golf history by reaching the top of the women's rankings aged 17

World number one Lydia Ko of New Zealand kept Amy Yang at bay to win the Women's Australian Open title.

The 17-year-old, the youngest ever world number one, carded a two-under 71 in the final round at the Royal Melbourne course for a two-stroke victory over South Korea's Yang.

Overnight co-leader Ariya Jutanugarn of Thailand shot a 76 to finish third.

England's Charley Hull was joint seventh after a final round of 73, finishing eight shots behind Ko.