World No1 amateur Lydia Ko will face her toughest test in her short golf career when she makes her major debut at the US Open on the notoriously tough Blackwolf Run Golf Club in Wisconsin.
The 15-year-old is accustomed to creating history but admitted she is heading into the unknown as she becomes the first New Zealand amateur to contest the US Open Championship.
"To play the US Open as an amateur, that's pretty amazing," said the Gulf Harbour golfer, who became the youngest winner of a professional event - both men and women - when she claimed the NSW Open.
"You know some people play as a professional their whole lives and they're unable to play the US Open so it's a big honour to be playing it."
The youngest ever Australian Amateur champion will become only the third New Zealand golfer to play the US Open after Lynnette Brooky (six times), who had a best finish of 12th in 2002, and Susan Farron (1995).