Defending champion YE Yang shot a four-under 67 Thursday to claim a share of the lead with Rickie Fowler after the first round of the Korea Open.
In front of his local fans, Yang sank a birdie putt on the final hole at Woo Jeong Hills Country Club. Fowler bogeyed the same hole.
U.S. Open champion Rory McIlroy was a stroke behind in a three-way tie for third with Hong Soon-sang and Lee Soo-min.
McIlroy, who finished third at the 2009 tournament, birdied the opening hole and missed a chance to take a share of the lead with a bogey on No. 18.