Brooks Koepka and Justin Thomas each have a shot to become World No. 1 this week in South Korea.
Through 18 holes of the CJ Cup @ Nine Bridges, both players are in the mix in Jeju Island. Koepka shot 1-under 71 with four birdies Thursday while Thomas made three birdies as part of his 1-over 73.
Chez Reavie leads outright at 4 under.
While the fourth-ranked Thomas has been No. 1 in the world before, holding the spot for four weeks last summer, third-ranked Koepka has yet to reach that top spot.
Koepka can achieve that goal with a win or, as long as Thomas doesn’t win, solo second this week. Thomas needs a win to move back to No. 1.