Unheralded American Ryggs Johnston has won his first professional title by claiming the Australian Open by three stokes, while South Korea’s Jiyai Shin claimed her second Women’s Australian Open which was played concurrently at two courses on the famed Melbourne sand belt.

The world’s 954th-ranked golfer caused a major upset at Kingston Heath, but despite his stirring win, the future of the Australian Open remains clouded.

Johnston, an unheralded American player, celebrated his first professional victory Sunday with a three-stroke triumph in the Australian Open, while South Korea's Jiyai Shin became a two-time winner of the Women's Australian Open, which was played concurrently at two courses on the famed Melbourne Sandbelt.

Unheralded American Ryggs Johnston won his first professional title Sunday by closing with a 4-under 68 at Kingston Heath for a three-shot victory in the Australian Open. The Arizona State alum was among three players to earn a spot in the British Open.

Unheralded American Ryggs Johnston can barely believe the company he's now in after crashing the party with a stunning and most improbable Australian Open triumph in Melbourne.

American rookie Ryggs Johnston and former world number one Shin Ji-yai win the men's and women's Australian Open titles.