SOUTHAMPTON, N.Y. (AP) — The U.S. Open lived up to its reputation in the return to Shinnecock Hills.

So did Dustin Johnson.

Fresh off a six-shot victory last week, Johnson managed all aspects of his game Thursday on a classic U.S. Open course that required nothing less. He wasn’t perfect, but he was under par — barely — and shared the lead at 1-under 69 in an opening round of strong wind, high anxiety and scores that made this feel like a U.S. Open again.

“You had to focus on every single shot you hit — putts, everything. It was just difficult all day,” Johnson said. “Every day out here is going to be difficult.”

It was plenty tough for Tiger Woods, who started with a triple bogey and added a pair of double bogeys on the back nine for a 78.

Phil Mickelson, Rory McIlroy and Jordan Spieth — the only three active players with three legs of the career Grand Slam — made only six birdies among them. They were a combined 25-over par, with Mickelson the low man in the group at 77.

Johnson, Ian Poulter, Scott Piercy and Russell Henley were the only players under par. That’s a sharp contrast from last year at Erin Hills, where 44 players broke par in the opening round to set a U.S. Open record.

Jason Dufner nearly joined them. He settled for a 70 with no complaints.

“I think it’s in fifth place,” he said. “So beat about 151 guys.”