The 117th U.S. Open got underway at Erin Hills on Thursday when Jordan Niebrugge teed off at the first hole at 06:45 local time.
Niebrugge, making his first appearance at the major in his home state of Wisconsin, was joined at the tee ahead of the gargantuan 7,700-yard course by fellow Americans Talor Good and Kevin Dougherty.
At the same time, the grouping of Kim Meen-whee, Ted Potter Jr and Daniel Chopra began their campaigns at the 10th hole.
Defending champion and world number one Dustin Johnson will tee off at the 10th at 08:35 local time, with fellow contenders Jordan Spieth and Martin Kaymer joining him.
A dry day is expected in Hartford - bad news for Phil Mickelson who it seems will be unlikely to arrive from his daughter's graduation in time to tee off - though rain could well interrupt play on Friday and Saturday.
The U.S. Open starts TODAY! pic.twitter.com/CuZnA4SO3O-- PGA TOUR (@PGATOUR) June 15, 2017