Scotland's David Law eagled the 18th as he overcame a three-shot deficit in the final three holes to win the ISPS Handa Vic Open - a first European Tour title.
Law overturned a three shot deficit in the final few holes, birdieing the 16th before draining an eight-footer on the par-5 last to win on 18 under.
France's Celine Boutier and Su Oh of Australia were tied for second.
She was at nine-under after four holes, three shots clear of a group of six players including Australians Kemp and Katherine Kirk. Now into her second season on the LPGA Tour after a solid first year when 61st on the money list in 2018, Boutier has won events on the Ladies European Tour but this victory elevates her to a new level.
Overnight leader Kim Kaufman from the United States continued to set the pace early in the final round.
In the men's event, Wade Ormsby will also take a two-stroke lead into Sunday's final round after carding a 2-under-par 70.
"I didn't expect to be in this situation". It is not something that I expected to happen.
"At the time I was just trying to get into solo second". We played alternate groups, it was good to catch-up with a lot of girls I grew up playing golf with as well.
"We had to go for it, so I sort of took a bit off a hybrid and lucky it went to eight-10 feet".
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The league's inaugural games kicked off this past weekend, pitting all eight teams against each other. Hackenberg and the Express will get a shot at redemption next Saturday against the Arizona Hotshots.
"We stood on the tee and we said we need to make eagle", Law said after claiming the A$1.5 million ($1.06 million) winner's check.
"Then standing on the 18th fairway, we knew that if you make an eagle, you put a bit of pressure on". It helped him to finish 14th on the Challenge Tour, which was good enough to earn him his place on the European Tour.
South African Justin Harding finished fourth, a stroke further back on 16-under. Scotland's David Drysdale and Australian duo Jason Scrivener and David Bransdon finished a shot further back.
"Walking to the tenth I hit the reset button and tried to keep calm", said Law, who called a penalty on himself for a moving ball on the ninth which resulted in a bogey.
Ormsby struggled to find many positives.
"I did say to myself on Saturday night, 'if I win tomorrow, I'm straight on a flight home!' But, on reflection, I knew I had a week off next week".
"I did not feel overawed by the situation and he said that was a great thing and that I just needed to carry on what I was doing".
Kennedy was delighted to have come so close. I'm happy, too, with the way I handled myself today. "It was nice to be in the mix at home. I think I made four or five in a row and it just -- it just all came together".
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