Dustin Johnson takes over golf's number one ranking after win

Dustin Johnson is the new world number one                                   

Johnson overcame some errant iron shots mid-round, storming home with three birdies in the final four holes for a five-under-par 66 on the damp and unusually lush Riviera course.

Johnson also finished tied for seventh at the 2015 PGA Championship, which was also held at Whistling Straits. Lanny Wadkins won at Riviera in 1985 at 20-under 264.

The weather may have been rough over the last couple of days, but Dustin Johnson is playing pristine golf at the Genesis Open.

"I believe in myself, I think I'm a great player", he said. Over his last 16 tournaments, he has finished no worse than third place in eight of them. Whether I get to number one or not doesn't really affect me. The PGA Tour, which initially said it did not comment on speculation, subsequently released a statement saying he had taken a voluntary leave of absence and had not been suspended.

But after he started dating Gretzky, Johnson came under the influence of her father, Wayne, the National Hockey League's career scoring leader, who impressed upon him that he has been given a gift and that he ought not to waste it. "I'm seeing the lines really well and I feel like I've got a pretty good touch on the greens right now".

Pieters birdied his final two holes to close a blemish-free round-of-the-day 63, with Brown mixing five gains with a sole blemish to also grab a share of second.

Johnson leads by one over Pat Perez and Cameron Tringale with Jhonattan Vegas, Patrick Rodgers and J.T. Poston two further back. "The best in the world, I mean until now I probably wouldn't have said I was the best in the world, but now I can say it".

But after three birdies in succession to end his third-round Johnson displayed he was not about to let-up making it five birdies in a row over the first two holes of his last round.

He said earlier this year that Riviera was the one tournament he wanted to win outside the majors because of his love for the course and how much he loves it, even though it has given him nothing but heartache.

Bryan dropped into a four-way tie for fourth, six strokes off the lead, with a 1-over-par 72.

Now, a victory might be enough to move him to No. 1 in the world. "Whether I get to No. 1 or not doesn't affect me at all".

"I don't know if you guys understand it", Johnson said in the interview room.