Former British Open winner Louis Oosthuizen shot a 5-under 67 Saturday to take a three-stroke lead after three rounds of the Perth International.

Oosthuizen, making his first tournament appearance in Australia, had a 54-hole total of 15-under 201 on the Lake Karrinyup Cointry Club course.

American Peter Uihlein (71) and Romain Wattel of France (65) were tied for second, with Australia's Jason Scrivener another stroke back after a 69.