Ko Jin-young's astonishing stretch of consecutive holes without dropping a shot ended after 114 holes when she had a bogey during the opening round at the Portland Classic in Oregon on Thursday.

Ko's mind-boggling run finished in surprising fashion when she missed a three-foot par at the ninth hole at Columbia Edgewater Country Club in Oregon.

The world number one, well aware of the streak, looked mortified when the ball dribbled left and barely touched the hole.

Ko had not dropped a shot since the second hole of the third round of the Women's British Open, where she finished third.

The South Korean then negotiated 72 holes at last week's CP Open in Ontario without a hiccup en route to victory.

LPGA officials could not find any record of a player previously having such a long unblemished streak.

On the PGA Tour, Tiger Woods went 110 holes without dropping a shot during his magnificent 2000 season.

Stephanie Meadow's 69 left her on three-under for the tournament, four shots off clubhouse leader Jane Park, who carded a terrific 65 to move to seven-under-par overall.