Hannah Green has etched her name into Australian golf history, becoming the first home winner of the Women’s Australian Open since 2014 with a dramatic one-shot victory at Kooyonga Golf Club.

The West Australian closed with a two-under-par 70 on Sunday to finish at 11-under for the championship, holding off a stunning final-round charge from Queenslander Cassie Porter and France’s Agathe Laisné.

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Porter electrified Kooyonga with a course-record 10-under-par 62 to set the clubhouse target at 10-under, while Laisné – winner of the Ford Women’s NSW Open a fortnight earlier – applied pressure throughout the afternoon before finishing alongside Porter in a share of second.

But the day ultimately belonged to Green, who arrived in Adelaide fresh from claiming her seventh LPGA Tour title at the HSBC Women’s World Championship in Singapore two weeks ago.

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“Yeah, it’s still really kind of crazy. I mean, it wasn’t long ago that I was making that putt to win the championship,” Green said afterwards.

“But I didn’t realise it’d been so long for even the males to win. So yeah, I feel really honoured to have my name on that trophy amongst so many other great players who have gone on to have really amazing careers.

“And obviously I’ve just come off a win on the LPGA, so I’m really excited for the rest of the season as well.”

Green now joins Australian greats Jane Crafter, Jan Stephenson and five-time champion Karrie Webb as local winners whose names appear on the Patricia Bridges Bowl.

“It’s amazing,” Green continued. “And I see so many other names, Inbee Park, Nelly Korda. Those girls have had such great careers.”

Green began the final round with a one-shot lead over Argentina’s Magdalena Simmermacher, but the leaderboard swung wildly throughout the day.

Porter’s astonishing 62 forced the leaders to respond, though Green admitted she was largely unaware of the extent of the charge until late in the round.

“I actually didn’t really know because I felt like there wasn’t that many on the front nine,” she said.

“And then we got to, I think it was the 14th, the par 3, and there was an electronic leaderboard and I saw Cassie’s name up there and I was, like… I don’t know. I couldn’t remember what she started for the day, but I was, like, ‘that is a very low score’.”

Green briefly strengthened her grip on the championship with a birdie at the 16th before a dropped shot at the par-4 17th cut her lead to one heading to the final hole.

“Luckily I made a good bogey on 17,” she said. “I could have probably had that tee-shot end up in a worse spot. So it ended up being in the bunker and I just had to take my medicine and make a bogey at best.”

Standing on the 72nd tee with a one-shot lead in her national championship was a moment Green had imagined many times.

“Yeah, absolutely,” she said. “I knew it was a wider fairway and I actually would say I got a member’s bounce. I hit it in the right mounds and it bounced onto the fairway.”

Green’s approach safely found the putting surface, sparking cheers from the large Adelaide crowd gathered around the 18th.

“For a moment there, I couldn’t see if it actually stayed on the green. So I was a little bit nervous,” she said. “But the crowd was cheering for it and I figured they wouldn’t cheer it if I missed the green. So that kind of settled my nerves.”

She would two-putt for the title, sealing her third professional victory on Australian soil.

“But it was just different playing in front of home,” Green said. “I knew everyone wanted me to have the trophy in my hands at the end of the day. So that was a really nice feeling.”

Already a major champion, Green admitted winning the national championship still carries unique significance.

“Yeah, I have said before that winning your home championship is like winning a major and I definitely still feel that way,” she said. “This is probably one of the bigger weeks for me off the golf course in terms of internal pressure.”

Having her husband, fellow professional Jarryd Felton, on the bag also helped steady the nerves during tense moments down the stretch. “There were a couple times where I was maybe a bit more down on myself from a shot or a result that was actually not bad,” Green said. “And he pulled me in and said, ‘Hey, it’s all right. You’re actually doing pretty well. Just don’t go too hard on yourself.’”

Despite the emotional victory, Green’s celebrations will be brief.

“I’m actually supposed to be on a flight in an hour and 45 minutes, so I don’t really think I’ll be doing a whole lot,” she joked. “I’m a big fan of MAFS (reality TV show Married At First Sight) and it’s on at seven o’clock, which is when I’m supposed to fly out. So I think I’ll be at the airport watching that on the plane.”

Green will head straight to the Gold Coast for next week’s Australian WPGA Championship at Sanctuary Cove Golf & Country Club as the Australian swing on the WPGA Tour of Australasia and Ladies European Tour continues.

“Yes, I’ve got to a really hot start this year,” she said.

“I just want to make sure that I’m still keeping myself grounded in a way.”