The 2018 U.S. Open has been all about Dustin Johnson through two rounds.
The 33-year-old American enters the third round at Shinnecock Hills Golf Club as the only player under par following a first-round 69 and second-round 67.
Johnson possesses a four-shot advantage over Scott Piercy and Charley Hoffman, while a collection of five players, including defending champion Brooks Koepka, sit five shots back.
Phil Mickelson, Paul Casey, Zach Johnson and Patrick Reed are among the golfers further down the leaderboard with plenty of work to do in order to put themselves in contention.