Auckland teenage golf star Lydia Ko has posted her worst round as a professional in the final round of the Kia Classic in California.
Ko had four bogeys and two double bogeys in her six over par 78 as she slumped to three over for the tournament to finish tied for 61st.
Sweden's Anna Nordqvist shot a final round 67 to win the event at 13-under.
Ko's next event is the first major of the year, the Kraft-Nabisco Championship, which begins on Friday.
