Following back-to-back rounds of 65 and 67, Brooks Koepka has opened a commanding four-shot lead at the CJ Cup.

A victory (or a runner up finish) in Korea by the three-time major winner would vault him into the world No. 1 position, ahead of Dustin Johnson.

Afterwards, Koepka said the opportunity would be especially meaningful if he were able to “earn” the top ranking.

“Yeah, that would be nice,” answered Koepka, when asked about the chance of becoming the world’s top-ranked golfer.

“It was something I wanted to do, I always wanted to become World No. 1 in a week that I was playing. I thought like I could really earn it and not have a week off where it just so happens that you bump up.

“No, it would be very special, and to do it here would be nice and hopefully get to World No. 1 and cap it off with a win, I don’t think there would be much better.”

Koepka will be paired with Scott Piercy and Ian Poulter, who are both 9-under par, in Sunday’s finale at Nine Bridges.