"I think I played really well out there but thought I struggled with my putting but when I look back to it, I only missed one or two within nine feet. So it was just the birdie putts I was struggling with. I finished well and that is the biggest thing for me."
The New Zealand Women's Open champion kicked into gear when she made back to back birdies to close out the front nine to make the turn in two under par 36. She added further birdies on the 15th and 17th and dropped her only shot of the day at the par four 16th.
Ko finished 13 shots back from South Korean Inbee Park who secured her second major win by carding a three under par 69 in the final round to win by four from compatriot So Yeon Ryu.
The New Zealand rep, who will climb from her ranking of No 25 on the Official World Rankings after this performance, continues her incredible record of never missing a cut in the 15 professional events she has played since making her debut in a pro event at the NZ Women's Open in 2010.
She has won three titles, finished runner-up twice and third once in world-class fields. She has also finished as the low amateur in all three major championships she has contested to earn an amateur record that is one of the best ever seen in the game.