PERTH - South Africa's Louis Oosthuizen hung on for a one-shot victory and his first win for 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 number 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 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. 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.