Built in 1903 with the express purpose of being the toughest golf course in the world, Oakmont has undergone a recent renovation under the guidance of Gil Hanse and promises to be as torturous as it has ever been.

Rough brushing players’ calves and sloping greens nudging 15 on the Stimpmeter have many questioning whether the best players on the planet will break par for 72 holes.

Wearing shorts emblazoned with the American flag that caused a social media stir of their own, Day said in a video posted to DP World Tour social media channels that not only would an 18-handicapper not play to their handicap, they’d need more than triple that number to even come close.

“A legit 18 marker, I think 150 is pretty solid,” said Day, which averages out to more than eight shots on every single hole.

“They would just struggle.

“I mean, it’s difficult out there. Most 18 handicappers typically don’t have the greatest control off the tee box. They’re probably hitting this swipey cut into the right rough. They’ve got no knowledge of how to hit the angle of attack on some of these so they’re hitting these shots which are coming out way left.

“They’re going to be beaming the ball across, back and forth.

“150 I feel like is very good for an 18-marker.”

Day played a practice round with fellow Australian Min Woo Lee on Tuesday, who also said that players who average 90 in their club competitions have no chance of breaking 100 at Oakmont at its fiercest.

“120,” was Lee’s estimation, 30-over an 18-marker’s handicap.

“The greens are so slick and slopey. And the rough is … I mean, we can barely get it out of the rough, so I don’t think an 18 handicapper would be able to get out of the rough.

“I don’t know if that’s ridiculous or generous, I’m not sure.

“Hopefully someone can experiment and average it out for us. But it’s a lot.”

Lee and Day make up a third of the Aussie contingent at Oakmont while there are 10 Australians teeing it up at the LPGA Tour’s Meijer LPGA Classic for Simply Give.

A week out from the KPMG Women’s PGA Championship, major winners Minjee Lee and Hannah Green will head the charge as Kirsten Rudgeley, Kelsey Bennett, Maddison Hinson-Tolchard and Amy Walsh line up for the Hulencourt Women’s Open in Belgium.

Photo: Mike Ehrmann/USGA

US Open
Oakmont Country Club, Oakmont, Pennsylvania
9:18pm*          Adam Scott
10:02pm          Cam Davis
10:02pm*         Cameron Smith
2:41am            Ryan Fox (NZ)
3:03am            Min Woo Lee
3:36am            Jason Day
3:58am*           Marc Leishman

Recent champion: Bryson DeChambeau
Past Aussie winners: David Graham (1981), Geoff Ogilvy (2006)
Prize money: $US21.5m
TV times: Live 8:30pm-10am Thursday, Friday; Live 12am-10am Sunday; Live 1am-9am Monday on Fox Sports 503 and Kayo.

LPGA Tour
Meijer LPGA Classic for Simply Give
Blythefield Country Club, Belmont, Michigan
9:15pm            Sarah Kemp
9:15pm*          Fiona Xu (NZ)
9:48pm            Cassie Porter
9:48pm*          Hannah Green
10:10pm          Robyn Choi
10:10pm*         Minjee Lee
11:05pm*         Karis Davidson
11:16pm          Grace Kim
3:10am*           Stephanie Kyriacou
3:54am*           Gabriela Ruffels
4:05am            Hira Naveed

Recent champion: Lilia Vu
Past Aussie winners: Nil
Prize money: $US3m
TV times: Live 5am-8am Friday on Fox Sports 507; Live 5am-8am Saturday; Live 6:30am-8am Sunday; 9am-11am Monday on Fox Sports 505 and Kayo.

Ladies European Tour
Hulencourt Women’s Open
Hulencourt, Belgium
4:43pm*          Kelsey Bennett
4:54pm*          Kirsten Rudgeley
5:16pm*          Momoka Kobori (NZ)
5:38pm            Amy Walsh
9:17pm            Amelia Garvey (NZ)
10:01pm          Maddison Hinson-Tolchard
10:23pm*         Wenyung Keh (NZ)

Recent champion: Patricia Isabel Schmidt
Past Aussie winners: Karen Lunn (1988, 1990), Corinne Dibnah (1991)
Prize money: €300,000
TV times: Live 11:30pm-2:30am Thursday, Friday on Fox Sports 507; Live 9pm-11:30pm Saturday; Live 9:45pm-12am Sunday on Fox Sports 505 and Kayo.

Japan Golf Tour/Korean PGA Tour
Hana Bank Invitational
The Heaven Country Club, South Korea
8:01pm            Brad Kennedy
9:40pm*          Junseok Lee, Michael Hendry (NZ)

Recent champion: Takashi Ogiso
Past Aussie winners: Junseok Lee (2022)
Prize money: KRW1.3b

Epson Tour
Great Lakes Championship
The Highlands, The Heather, Harbor Springs, Michigan
Australians in the field: Su Oh, Jess Whitting

Recent champion: Inaugural event
Past Aussie winners: Nil
Prize money: $US250,000

HotelPlanner Tour
Raiffeisenbank Golf Challenge
Kaskáda Golf Resort, Brno, Czech Republic
9:30pm            Hayden Hopewell
9:30pm*          Sam Jones (NZ)
9:40pm*          Jye Pickin

Recent champion: Hamish Brown
Past Aussie winners: Nil
Prize money: €300,000

LET Access Series
Amundi Czech Ladies Challenge
Panorama Golf Resort, Kacov, Czech Republic
Australians in the field: Stephanie Bunque, Justice Bosio, Belinda Ji, Abbie Teasdale, Kristalle Blum

Recent champion: Helen Briem
Past Aussie winners: Nil
Prize money: €45,000

Legends Tour
Costa Navarino Legends Tour Trophy
Costa Navarino, Greece
5:17pm            Michael Campbell (NZ)
5:28pm            Scott Hend
6:23pm            Michael Long (NZ)

Recent champion: Clark Dennis
Past Aussie winners: Nil