Koepka grabs four-shot lead after firing a 67

Brooks Koepka has improved his chances of taking over as No. 1 golfer in the world, shooting a bogey-free 5-under 67 Saturday for a four-stroke lead after three rounds of the CJ Cup in Jeju, South Korea.

Koepka had a three-round total of 13under 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 of the CJ Cup, does not finish any better than second.

Thomas shot a 71 Saturday and is at 1 under, 12 strokes behind Koepka and tied for 43rd. It would be Koepka’s first appearance at No. 1.

Dustin Johnson is currently No. 1, Koepka is third and Thomas fourth. Johnson and No. 2 Justin Rose are not playing this week.

There were six golfers tied for fourth in South Korea, including Rafa Cabrera Bello, who shot 65 Saturday, and firstround 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.

LPGA Tour: Carlota Ciganda of Spain fired a 5-under 67 to share the lead with Sei Young Kim after the third round of the LPGA Shanghai.

Ciganda carded her fifth birdie of the day on the par-4 18th to finish tied with overnight leader Kim at 11-under 205. Kim shot a 71 with four bogeys and five birdies.

Angel Yin also birdied the final hole for a 68 and was a further stroke back with Brittany Altomare (69), Danielle Kang (71) and Ariya Jutanugarn (71).

Champions Tour: Jay Haas shot a 7under 65 – missing his age by a stroke – to take a two-shot lead in the playoffopening Dominion Energy Charity Classic in Richmond, Va.

Trying to become the oldest winner in tour history, the 64-year-old Haas birdied the par-5 16th and 18th holes to get to 11-under 133 on The Country Club of Virginia’s James River Course.

Mike Fetchick set the age record of 63 years to the day in the 1985 Hilton Head event. Haas is second on the list, taking the 2016 Toshiba Classic at 62 years 10 months 7 days for his 18th senior title.

Stephen Ames and Scott Dunlap were tied for second. Ames had a 67, and Dunlap shot 68.

Madison’s Jerry Kelly had a 67 and was six shots off the pace.