Brooks Koepka has improved his chances of taking over as the No. 1 golfer in the world, shooting a 5-under 67 Saturday to take a four-stroke lead after three rounds of the CJ Cup at Nine Bridges.

Koepka had a three-round total of 13-under 203. Ian Poulter, who shot 68 Saturday, was tied for second place with second-round leader Scott Piercy, who had a 72.

The 28-year-old Koepka, who trailed by one stroke after two rounds, will move to the top of the world rankings if he wins the tournament and former No. 1 Justin Thomas, the defending champion here, does not finish any better than second.

Thomas shot a 71 Saturday and is at 1-under, 11 strokes behind Koepka and tied for 43rd.

Dustin Johnson is currently No. 1, Koepka is second and Thomas third.

Justin Thomas of the United States blasts a shot on the 10th hole during the first round of the CJ Cup PGA golf tournament at Nine Bridges on Jeju Island, South Korea, Thursday, Oct. 18, 2018. (Park Ji-ho/Yonhap via AP)

There were six golfers tied for fourth, including Rafa Cabrera Bello, who shot 65 Saturday, and first-round leader Chez Reavie (70).

Shubhankar Sharma of India had the round of the day, a 64, to move to 3-under, 10 strokes behind Koepka.

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Source: The Associated Press