Lydia Ko has won her third Canadian Women's Open, beating world number three Stacy Lewis in a playoff.
Ko won the sudden-death playoff on the first hole, holing a three footer for par to defeat Lewis, who could only manage a bogey.
Ko began the day in a share of the lead and moved out to a two-shot lead following a birdie on the par three third. But the 18-year-old dropped a shot at the par four ninth to move back to 12-under.
She parred the back nine to end up firing an even-par 72, and joining the playoff with Lewis, who shot a 67.
Ko previously won the Open in 2012 at Vancouver Golf Club at 15 years, 4 months to become the LPGA Tour's youngest winner and fifth amateur champion. She successfully defended her title in 2013, also as an amateur, in Edmonton, Alberta.
It is Ko's eighth LPGA Tour title, and third LPGA Tour win in 2015, after wins in hthe Swinging Skirts LPGA Classic in April and the Australian Women's Open in February. She also won the New Zealand Women's Open in March.
She now holds a perfect 3-0 record in playoffs.
