A 90-minute rain delay at 9.45am due to the intense showers that lashed Sydney on Thursday meant that the afternoon groups played late into the evening, Micheluzzi completing his round of five-under 66 just before 7pm.

Lucas Higgins is one of a number of players who will complete his opening round on Friday morning, the young New South Welshman completing 16 holes at four-under par to be outright second and just one shot off the lead.

Australian PGA champion Jed Morgan and the returning Brendan Jones were the best of the morning wave with rounds of three-under 68, Cameron John and Aaron Pike (through 16 holes) joining them in a share of third in the calmer afternoon conditions.

Fourteen players are tied for seventh at three-under par with a total of 36 players within four shots off Micheluzzi’s round one advantage.

“It was brilliant. One of my finest this season,” said Micheluzzi, who drove three of Bonnie Doon’s short par 4s on the back nine for birdies and charged home with three birdies in his final five holes.

“Missed one green and got up-and-down and hit two par-5s in two.

“Didn’t have a really great day with the putter to be honest but I just gave myself chances on the short par 4s and the par 5s and that’s where I got it done.

“Just got to string four rounds together. I know I’ve been playing well, the results this year have been great, four rounds in the 60s and we’ll see what happens.”

The 47-year-old has played just one competitive tournament since March 2020 to fall to 1,685 in the world having once been ranked as high as No.52.

He has revelled in the opportunity to work for a landscaping company and spend time with his two sons for the past year but is now ready to down tools and take a final crack on tour.

“I generally play my best fresh and can’t get much fresher than what I am,” said Jones, who warmed up for his competitive return by joining 11 mates on a golf trip to King Island.

“I know I’m still good enough. I’ve got a new set of clubs and probably the best attitude I’ve had for a long time.

“I don’t mean to sound big-headed but it felt like I did it really easily.

“My tee-to-green doesn’t change and I know that when I do sharpen up the chipping and putting that I’m going to be competitive again.

“That’s something to look forward to.”

A double-bogey at 16 and three-putt bogey at the last saw him end the day in the logjam at two-under but buoyed by a strong start in elite company.

“I’ve been hitting it pretty solid for a while, it’s just a matter of getting comfortable out here,” Armour said.

“A few missed cuts by close margins but feeling more comfortable each week and I’ll put in some good results if I keep playing like this.

“I was playing solid after the rain delay and managed to keep momentum going. Fell off a little bit at the end but it’s hard to keep it going when the weather is like that.”

Queenslander Kade McBride delivered the highlight of day one, holing out for an ace with a 3-wood at the 292-metre par-4 12th.