Dustin leads, Day dives at windy US Open

Evin Priest
Jason Day shot a nine-over 79 on a brutal opening day of the US Open at Shinnecock Hills

World No.1 Dustin Johnson and fellow American Russell Henley have taken advantage of a capitulation from golf's big guns midway through a tough first day at the US Open.

Seemingly impervious to brutal conditions thrown up by the notoriously difficult par-70 Shinnecock Hills course and 30km/hr winds, Johnson is two-under-par through 13 holes to sit atop the leaderboard alongside Henley.

Ian Poulter and Scott Piercy were out in the morning wave with similar gusts and share third at one-under having carded 69s.

Aaron Baddeley and Marc Leishman lead the Australian charge at four-over having each posted a 74 while world No.8 Jason Day struggled to a 79.

"It was tough; I missed two fairways for the day and felt like I was fighting the whole way," Leishman said.

Other Australians in the field include Matt Jones (76) and Adam Scott at six-over, Cameron Smith and Lucas Herbert Herbert (77), Jason Scrivener (78) and David Bransdon (79).

Day posted his equal-worst round at the US Open - matching his score from round one at last year's US Open when he missed the cut - to join a list of high-profile victims at the Long Island course.

Tipped as a pre-tournament favourite, Day sits 11 shots off the pace.

"It's really difficult out there," Day said.

"The wind was strong, the ball is getting blown around so much and with the locations of the pins you can't get it close and on top of that it's hard to putt," he said.

Three-time winner Tiger Woods racked up a triple-bogey seven on his first hole and has plummeted to six-over par after four-putting the 13th for a double-bogey six.

Multiple major winners Phil Mickelson (77) and Jordan Spieth (78) had nightmare rounds, while former champion Rory McIlroy carded a 10-over-par 80.

However, worst round of the day so far goes to former British amateur champion Scott Gregory, who suffered through a 22-over 92.

The 23-year-old became the first player in 16 years to shoot 90 or worse at the US Open.

"It's been a long time (since failing to break 90) and this is not really the week I wanted to revisit that score,'' he said.