Aiden Didone shows off the mighty Porter Cup in New York.

You hear from & # 39; scoreboard pressure all the time & # 39; in other sports, but Aiden Didone gave a masterclass today to win a classic American golf for amateur golf.

The Victorian, 21, slowly but surely grown up as an elite amateur, showed the wile of someone much more experienced at the pointy end of tournaments to snare the Porter Cup in New York.

After a back and forth fight with Chun An Yu, a collegiate golfer with the state of Arizona who already has two US Open appearances under his belt, Didone simply turned the screws when it mattered.

The Metropolitan member arrived at the 71st hole, all square in an effective matchplay situation with his Taiwanese opponent in the Niagara Falls Country Club.

But when he rolled into a 5-meter birdie bomb, the 4-meter Yu was confronted with suddenly looked three times that far.

Yu knocked his bird past, and was unable to retrieve the 1.5 m par putt, the lipout gave DIdone a decisive lead with two shots.

A great up and down greenside rough on the par-three closing hole ended the third Aussie victory at the 61st edition of the Porter Cup, after victories over Geoff Drakeford (2014) and Harrison Endycott (2016).

"It's all a bit blurry," said Didone, who made his breakthrough at the Tasmanian Open earlier this year.

"I went along for a long time and didn't really know if I would have a moment like this … then it clicked more or less last year and since then I play much better."

And when he sees that his rounds of 68-68-65-69 put his name on a trophy that sports greats like Phil Mickelson, David Duval and Ben Crenshaw, the modest Melburnian will probably appreciate it even more.

"I played pretty well in the third round to give myself a chance, but I was still three behind," Didone said.

“But it's amazing where you're going if you're in that situation and you suddenly have a chance (to win). I was really happy to just play consistently and make the right shots right now.

"It feels really good … like I said, a bit blurry."

No one has had the chance to test its shape at this week's Western Open, nor has the upcoming American amateur already started the long trek home.

"Maybe I should have given them a cheeky note and tried my luck," said Didone, who will instead focus his efforts on the upcoming Australian amateur season.

"I'm still learning, but hopefully it will come together a little."