Ko misses history as US Women's Open bid unravels

Jul 10, 2016; San Martin, CA, USA; Lydia Ko reacts after playing the first hole during the final round of the women's 2016 U.S. Open golf tournament at CordeValle Golf Club. Mandatory Credit: Kelvin Kuo-USA TODAY Sports

(Reuters) - World number one Lydia Ko was seemingly well placed to carve out another slice of golfing history at the U.S. Women's Open on Sunday until she stunningly dropped five shots in seven holes around the turn.

From leading the championship by two strokes with 12 holes to play, the 19-year-old South Korean-born New Zealander found herself trying to play catch-up on a challenging layout with little margin for error at CordeValle Golf Club in San Martin, California.