New Zealand's top amateur golfer Lydia Ko has qualified for the semi-finals of the US Championships in Ohio.
15-year-old Ko beat South African Paula Reto 3 and 1 in the quarter-finals
Ko says she didn't play her best today, but she still managed to shoot 2 under par, so something was pretty good.
The world number one ranked player will meet 16-year-old Ariya Jutanugarn of Thailand in the semi-finals.
