An unwanted feat he repeated at the 4th and 9th holes.

Meanwhile playing partner Bo Jin of China made three birdies to one bogey over the same stretch to lead the Aussie by three at the turn.

The reigning NSW Amateur and NSW Open champion found his confidence and spark at the halfway turn however, making three birdies on the trot starting at the par-5 11th.

“Honestly the putt that I hit on 10 really got things going for me. I hit a really good putt from about 25-30 foot. I gave it a good look and then from then I took my time walking to the next tee under the tunnel. I really just had a few deep breaths and really just reset. And tried to get things going again,” Crowe said after the round.

Jin, the brother of 2015 AAC winner Cheng, had no intention of doing the Australian any favours though and holed his approach at the short 12th for an eagle to be clearly the man to beat.

Crowe celebrates with his Australian teammates on the 72nd green. PHOTO: Asia-Pacific Amateur Championhip.

Bogey came at the next for Jin, before a Crowe birdie at the par-5 15th, where Jin could only manage par, made things all level on 14-under-par.

With a mouth-watering prospect of a head-to-head battle building, Crowe gave his Chinese competitor breathing room when he bogeyed 16, only to have the lead by the time the pair took the boat off the island 17th green back to dry land with Jin having found the water and two putted for a double bogey five to Crowe's par.

Despite having trouble visually with the 18th tee shot all week, Crowe smashed his drive down the right side of the fairway, then must have had his heart in his mouth as his approach sailed long and dangerously close to the waterfall long and left.

“It’s an awesome feeling and an extremely good reason not to turn (pro) at this minute." - Harrison Crowe.

“I did think it was going to go in the water,” Crowe said of the second shot. “I pulled it but I flushed it, so I thought it had plenty on, but luckily it just caught a bit of grass. “

Jin made a comfortable par, leaving Crowe with a knee knocking four foot putt for par to secure a one shot win at 13-under and Australia’s third win in the tournament after Curtis Luck triumphed in 2016 following Antonio Murdaca’s lead of two years prior.

“No,” he said when asked if he had ever been as nervous in his life. “No I haven’t. I don’t think the putter kept still.”

The victory delaying the 21-year-old’s decision to join the professional ranks, understandably so given it comes with starts at The Masters and The Open in 2023.

“I honestly think it helped me play well this week,” Crowe said of his initial plans to turn pro after this week. “I didn’t have too many expectations. I didn’t want to prove myself this week. But I thought I want a solid week and then onto the next chapter but this is how I want to delay things.

RIGHT: Crowe lets fly with a celebratory fist pump as his par putt falls. PHOTO: Asia-Pacific Amateur Championship.

“It’s an awesome feeling and an extremely good reason not to turn (pro) at this minute."

Crowe’s round in the 70s, 72 to be exact, wasn’t an uncommon theme for the Aussies on Sunday, when only Jeffrey Guan managed a round in the 60s, his 69 taking him to a nine-under total and share of third place.

Karl Vilips was the next best despite finishing his round double bogey-bogey to shoot 71 for T11, with Connor McKinney sharing 24th (-3), Joshua Greer joint 35th (even) and Hayden Hopewell rounding things out at T44 (+5).

Pre-tournament favourite Ratchanon Chantananuwat peaked the interest of the locals when he reached 10-under for the tournament through 12 holes having seemingly shot himself out of things with a Saturday 76.

But two bogeys and a double left the 15-year-old Asian Tour winner back in 13th and disappointed with his week.

“It has been a pretty terrible week,” Chantananuwat said. “Barely any good golf, and every time I hit a bad shot even if it was just a small mistake I would get punished. Hasn’t been the best, on the worst side.”

It certainly was quite the opposite for Crowe, who will jump further up the World Amateur Golf Rankings from his 42nd rank and have the opportunity to hone his craft at the two biggest tournaments in world golf.

“It means so much. I started this year extremely well. I played a lot of good golf, but towards the middle of the year when I travelled overseas I didn’t play good golf at all,” a slightly emotional Crowe said. “So I came out here with something to prove and I am really proud of myself for the way I handled myself on the course, off the course especially as well. I feel like I just did the right things this week.”

For now his off course plans involve celebrating with his teammates, as well as his dad Tony and his mate ‘Dipper’.

“I haven’t tried either yet,” he said when asked if it would Singha or Chang as the local drop of choice.

One could be fairly certain Crowe might just sample both as he celebrates an enormous achievement in Thailand.