World No.21 Louis Oosthuizen survived a final-day charge from Australian Jason Scrivener to win the Perth International at Lake Karrinyup by one stroke on Sunday.

Oosthuizen took a three-shot lead into the fourth round, but a sizzling start by Scrivener saw him briefly join the South African at the top of the leaderboard.

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But bogeys on the ninth and 10th killed off Scrivener’s chances, with Oosthuizen holding his cool to finish at 16 under, securing his first title since 2014.

Frenchman Alexander Levy finished outright second at 15-under after shooting a six-under 66 in his final round.

Scrivener, who nailed a 60-foot putt on the 18th hole, was third at 14 under after shooting 69 in his final round.

Gregory Bourdy (13 under) and American Peter Uihlein (13 under) rounded out the top five.

Australian Brett Rumford, who held a share of the lead after two rounds, finished seventh at 11-under.

Veteran Peter Senior, using the short putter in a tournament for the first time in almost 30 years, finished at nine under.

Countryman Marcus Fraser, who won the Maybank Championship in Malaysia last week, carded eight-under par for the tournament.

World No.37 Victor Dubuisson and past champions Thorbjorn Olesen and Jin Jeong all failed to make the cut.

Meanwhile, Jiyai Shin’s composure under pressure gave her a three-shot victory at the Ladies Masters at Royal Pines.

Shin birdied three of the final four holes to close with a 69, finishing at 14-under.

She was three shots clear of England’s Holly Clyburn (70).

Clyburn claimed outright second place over playing partner Camille Lennarth and Nicole Broch Larsen with a birdie on the 72nd hole.

Shin, who was No.1 ranked player in the world for six months in 2010 and 2011, started the day with a two shot advantage and was never headed although Lennarth drew level midway through the round.

– with AAP