Ko – like Day a former World No.1 – birdied the seventeenth gap and had a tap-in par at 18 because the pair edged out Canada’s Brooke Henderson and Corey Conners by one shot.
Ko and Day posted their second straight spherical of six-under-par 66 to complete at 26-under 190 for the three-day occasion.
The event featured 16 blended groups with one male and one feminine participant.
The groups performed a scramble format on Friday and foursomes (alternate shot) Saturday.
Sunday’s remaining spherical was a modified four-ball, by which each teammates teed off, then switched balls for his or her second photographs and performed that ball the remainder of the opening.
“This has simply been an excellent begin for the 2 excursions coming collectively and having a blended occasion.” – Lydia Ko.
Ko and Day had a two-stroke lead coming into the ultimate spherical and mixed to card six birdies with out a bogey on Sunday.
“It felt like probably the most stress-free win as a result of I simply knew (Ko) was going to step up in the long run, which was improbable,” Day stated.
“It was a enjoyable week. Having the 2 Excursions be part of this week was a enjoyable option to end the 12 months out.”
Ko additionally loved the format of the season-ending mixed-gender event.
“I discovered lots, whether or not it was short-sided chips or simply the best way to commit and hit bombs down there,” she stated.
“This has simply been an excellent begin for the 2 Excursions coming collectively and having a blended occasion.
“I actually hope that is one thing that continues for a very long time.”
Conners and Henderson had a wild begin. They had been in a position to card an eagle on the par-5 1st gap and birdied the par-4 2nd earlier than having to accept a double bogey on the par-4 third.
They added a second eagle when Conners holed out on the par-4 ninth, and so they birdied 5 of the subsequent six holes to get to 25-under general and put the strain on Ko and Day with a final-round 63.
Swedes Madelene Sagstrom and Ludvig Aberg had been third at 24-under after a final-round 60, with 10 birdies and a late eagle.
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