Rickie Fowler and Xander Schauffele both managed to break the record for the lowest score in US Open history within the space of 30 minutes to share the early lead in Los Angeles.
The Californian duo shot eight-under-par 62s, matching the lowest round in a major, shot by South Africa’s Branden Grace at the 2017 Open Championship.
Bryson DeChambeau and Scottie Scheffler lead the chase five shots behind.
A frustrated Jon Rahm shot a 69, while Rory McIlroy is in the late starters.
Frenchman Mathieu Pavon struck the 49th hole-in-one in US Open history – at the par-three 15th – on a lively opening morning at Los Angeles Country Club.
More to follow.