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INCHEON, South Korea -- Kim Seung-hyuk shot 6-under 66 Thursday to take a two-stroke lead on the opening day of the SK Telecom Open.
The 28-year-old South Korean had nine birdies and a triple-bogey on No. 6, his 15th hole of the day.
"It was overconfidence," Kim said. "I thought I could hit anything, but I sliced my iron off the tee and that was the end."
Kim closed his round with 50-footer for birdie.
"I was playing very well off the tee and with my approach shots," Kim said. "It was one of those days where everything was going well."
Lee Tae-hee (68) is second, with Kim Kyun-tae and six others a further two strokes behind at 2-under 70.
Defending champion Matthew Griffin and three-time winner K.J. Choi played together and both shot 73.
"I will need to judge the greens a bit better tomorrow," Choi said.