After romping to victory at Victoria Golf Club, Adrian Meronk became the first Polish player in the Australian Open.
The Stonehaven Cup was won by DP World Tour star, who captured it with an eagle at hole 72 in a closing four-under 66.
Meronk, who was 13 years old, denied Adam Scott a second Open title. Australias third-round leader ended with a disappointing 74.
Min Woo Lee (69), finished third, a further shot back at nine below to secure a not insignificant consolation prize: a ticket to next years British Open at Royal Liverpool.
The 151st Open was granted to the three highest finishers, if they were not exempted.
Meronk, Scott had already qualified, leaving Alejandro Canizares (64), and Lees fellow West Australian Haydn Barbon (68) to take the other two spots. They had shared fourth at seven under.
Ashleigh Buhai survived an afternoon full of carnage and won the Australian Open, a feat that Cameron Smith cannot claim.
After Grace Kim, a Sydney prodigy, collapsed, the South African won. This was to end local hopes for another year.
Buhai won by one stroke over Korean Jayai Shin (75) at Victorian Golf Club.
Buhai won her 12-under 72-hole final with a total of 277. She also won at Muirfield to win her maiden major championship.