A promising 36-hole start had Rory McIlroy in line for his first victory of 2013, only to see it vanish with a run of bogeys on the back nine Saturday in the Kolon Korea Open.
McIlroy had opened with rounds of 70-69 to trail by just two entering the weekend, but a double-bogey on the par-4 10th started a downward spiral that led to a 75.
"A frustrating day, because I was in contention after two days and if you shoot a solid score today you're right in there. I've just got to go out there tomorrow and shoot the best score that I can," McIlroy said."I just think the story of the day is that I missed a lot of putts, missed a lot of chances for birdies at the start of the round and then missed a few short ones for pars in the middle and end of the round. That's really what it was."
Hyung Tae-Kim fired a bogey-free 66 and opened up a four-shot lead in the OneAsia Tour event, where McIlroy finished second to Rickie Fowler in 2011.
McIlroy's win at the European Tour's season-ending DP World Tour Championship in November 2012 was his last professional win. He has fallen to No. 6 in the Official World Golf Ranking after starting the year at No. 1.