The USGA admitted it was at fault on Saturday after several players blasted the US Open course set up at Shinnecock Hills.
Dustin Johnson still believes he is in a strong position to win the US Open, despite seeing his four-shot advantage wiped out.
Tony Finau and Daniel Berger made big moves at the US Open after profiting from the morning conditions to earn a share of the lead.
Justin Rose and Ian Poulter vowed to remain positive going into the weekend at the US Open despite trailing Dustin Johnson by five shots.
Dustin Johnson moved four shots clear at the US Open after challenger Ian Poulter fell away with a dreadful finish to his round.
On a testing opening day at the US Open, world number one Dustin Johnson demonstrated his prowess as one of four co-leaders.
Andrew Putnam equalled the best PGA Tour round of his career to join Dustin Johnson at the top of the St Jude Classic leaderboard.