Brooks Koepka has become golf’s world number one for the first time. Victory at the CJ Cup in Korea was enough to propel him to the summit of the rankings when they were updated on Monday.

The 28-year-old won two majors this year, the US Open and PGA Championship, and he replaces fellow American Dustin Johnson in top spot.

A delighted Koepka said: “To be world number one is something I dreamed of as a kid. I don’t think this one’s going to sink in yet.

Everything I’ve done this year has been working, so I don’t want to change anything – just keep improving.

“I’m so excited right now, you have no idea. I can’t wait to go play again.”

Koepka shot an eight-under-par round of 64 on Sunday to complete a four-shot victory over Gary Woodland, who carded a final round of 63.

Woodland was tied for the lead when he walked off the 16th green but dropped a shot at 17, while in the group behind Koepka birdied both 15 and 16 to all but seal the deal.

Koepka will return to action at this week’s World Golf Championships event in China, the HSBC Champions.

He is a 17.00 shot with Dafabet for the next major, the Masters at Augusta in April.

That price makes him only the joint-sixth favourite. Jordan Spieth heads that market at 10.00 with Tiger Woods offered at 11.00.