Lydia Ko, the 16-year-old New Zealand amateur, successfully defended her Canadian Women’s Open title Sunday, closing with a 6-under-par 64 at Royal Mayfair in Edmonton, Alberta, for a five-stroke victory and her fourth win in professional events.
Last year in Vancouver, the South Korean-born Ko became the youngest winner in LPGA Tour history at 15 years, 4 months. She also was the fifth amateur winner in tour history and the first since JoAnne Carner in the 1969 Burdine’s Invitational.
‘‘I'm pretty surprised, but I played some really good golf out there, so I was really happy about that,’’ Ko said. ‘‘My goal today was to shoot 5 under and just play my own game. If somebody else shot better, then I can’t do anything about it.’’
She bristled when asked about losing out on another $300,000 payday.
‘‘I don’t care. I don’t care,’’ Ko said. ‘‘I can say that a couple times more, if you want.’’
Ko had a 15-under 265 total. Karine Icher (67) was second.
Caroline Hedwall, the Swede coming off a record 5-0 performance last week in the Solheim Cup for Europe, had a 71 to tie for third at 9 under with Brittany Lincicome (69).
Champions — John Riegger shot a 4-under 68 and claimed two-stroke victory over John Cook (65) in the Boeing Classic in Snoqualmie, Wash. Riegger finished at 15-under 201.
Fred Couples (66) was third, four shots back.
The 50-year-old Riegger birdied three of the final four holes — holing a 20-footer for birdie on the par-5 18th.
European — Tommy Fleetwood birdied the first playoff hole to edge Stephen Gallacher (67) and Ricardo Gonzalez (70) and win the Johnnie Walker Championship in Gleneagles, Scotland — his first tour victory.
Web.com — Bronson La'Cassie beat Matt Bettencourt in a playoff to win the Cox Classic in Omaha and earn a PGA Tour card with a sixth-place finish on the season money list.
Jim Renner of Plainville earned his card by finishing 17th on the list.