PERTH (AFP) - South Africa's Louis Oosthuizen hung on for a one-shot victory and his first win in more than two years in the European and Asian Tour co-sanctioned Perth International at Lake Karrinyup on Sunday.

A one-under 71 was enough to get the world No.21 home on 16-under 272 over Frenchman Alexander Levy after a closing round containing three birdies and two bogeys.

The 2010 British Open champion led by three shots heading into the final round, but he briefly lost the lead to Australian Jason Scrivener.

However, birdies at the seventh and eighth holes steadied Oosthuizen as Scrivener fell away with consecutive bogeys on the ninth and 10th holes.

Oosthuizen had a three-putt bogey at the final hole as he won his first tournament in Australia and his first since the Volvo Golf Championship in 2014.

Levy fired the equal-lowest round of the day - six-under 66 - to fall just short of forcing a play-off with 15 under, with Scrivener holing a 60-foot putt at the last hole to finish outright third at 14 under.

Another Frenchman Gregory Bourdy, who only made the weekend cut by one stroke, finished in a tie for fourth place with American Peter Uihlein at 13 under after closing rounds of 65 and 66.

A third Frenchman Romain Wattel finished with a par 72 for 12 under and outright sixth place.

Oosthuizen's 13th career triumph continues a successful history of South Africans at Lake Karrinyup tournaments, with Ernie Els (2002) and Retief Goosen (2003) claiming Johnnie Walker Classic wins at the course.

Oosthuizen was the highest ranked golfer at the Perth International.

He was runner-up at the 2012 Augusta Masters losing at the second play-off hole to American Bubba Watson and also lost in a play-off at last year's British Open.