Dustin Johnson says that he is playing some of the best golf of his career as he moved into a share of the lead at the Pebble Beach Pro-Am in California.
A second round 64 puts him 12 under for the tournament, giving him the lead alongside fellow American Beau Hossler.
It was a near-perfect round for the world number one with eight birdies and just a single dropped shot and, after winning the first event of the year, at Kapalua in Hawaii, he feels in the kind of form that propelled him towards three successive wins this time last year.
He said after his round: "I don't know if it's quite as good as it was during that stretch.
"That was probably some of the best golf I've played in my career, but parts of the game are just as good.
"I would say that I'm driving it well, but I'm probably not quite as good as I was when on those three wins, but everything else feels like it's really good."
While Johnson was enjoying the course at Monterey Peninsula, it was a slightly different story for Rory McIlroy.
Starting the second round four shots off the lead, he fell back down the leaderboard with a three-over par 74 including a double-bogey on the fifth where he four-putted from just six foot.
Meanwhile, Phil Mickelson shot 65 on day two to leave him three shots off the lead while Paul Casey had a round of 70 and is seven under at the halfway stage.
Johnson is 100/1 to win the tournament with McIlroy 2000/1 and Casey priced at 1000/1.
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