World number one Lydia Ko produced her worst result of 2016 with after finishing well back at the latest LPGA event in South Korea.

Ko carded a two-over 74 in the final round at the KEB HanaBank Championship to finish tied for 51st at three-over for the tournament. The fact it is Ko's worst performance of the year just shows how strong a season she is having, which has included four victories, a silver medal at the Olympics and 20 straight cuts made.

The 19-year-old finished 13 shots behind winner Carlota Ciganda of Spain.

Ciganda needed a big break to get in a playoff against Alison Lee after the American bogeyed the 18th hole. Ciganda then won the first playoff hole.

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"I was just trying to stay in the present and hit as best I could," Ciganda said. "In the end, it was so close. I think I was the lucky one today and I'm very happy."

Ciganda lost a five-stroke advantage on the final five holes - getting into the playoff when Lee bogeyed the par-5 18th after hitting her third shot into the water.

"The last three, four holes I was pretty nervous," said Ciganda, who played in the group ahead of Lee. "I was looking more and I was 1 up, and then I was on 18 I saw I was 1-down and I couldn't believe it. So it's just golf. Only one can win."