Brittany Lang held her nerve to finally claim her first win on the LPGA Tour at the Manulife Financial LPGA Classic at the Grey Silo course in Ontario.
The American saw off Korean trio Seo Hee-kyung, Inbee Park and Chella Choi in a three-hole play-off to break her duck at the 144th attempt in her seventh year on the tour.
The four players finished level on 16 under par after 72 holes, leaving them to replay the 18th until a winner was found, and Park, who had taken a two-stroke lead into the final round, was the first player eliminated.
Lang and Seo shared the hole in birdies the second time round, meaning Choi's eight-under-par final round of 63 was not rewarded with a winner's cheque.
Lang then birdied the par five for the third time in succession, hitting a bunker shot to two feet to set up the chance, to finally shake off Seo and claim the first prize of 195,000 US dollars (£125,000). The three runners-up each earned 90,231 dollars (£58,000).
The victory makes Lang the fourth first-time winner on the tour this year, following fellow American Jessica Korda, Spain's 2010 rookie of the year Azahara Munoz and Chinese world number four Shanshan Feng.
American Stacy Lewis and a fourth Korean, Ryu So-yeon, shared fifth place on 15 under with Feng a further shot back along with Sweden's Anna Nordqvist.
Hur Mi-jung made it five Koreans in the top 10, which was completed by Sandra Changkija and Karin Sjodin in a share of 10th
Collated final-round scores & totals (USA unless stated, par 71):
268 Brittany Lang (USA) 69 65 67 67 (Brittany Lang won after a three hole playoff), Chella Choi (Kor) 69 66 70 63, Hee Kyung Seo (Kor) 66 68 67 67, Inbee Park (Kor) 69 64 66 69
269 So yeon Ryu (Kor) 70 65 70 64, Stacy Lewis (USA) 72 64 69 64
270 Anna Nordqvist (Swe) 64 72 67 67, Shanshan Feng (Chn) 66 68 70 66
271 Mi Jung Hur (Kor) 69 68 68 66
272 Sandra Changkija (USA) 63 72 69 68, Karin Sjodin (Swe) 67 68 69 68
274 In Kyung Kim (Kor) 70 69 70 65, Karine Icher (Fra) 72 68 66 68
275 Paula Creamer (USA) 69 68 71 67, Lexi Thompson (USA) 66 69 70 70, Jodi Ewart (Eng) 68 68 72 67, Jacqui Concolino (USA) 69 70 69 67
276 Jennifer Song (USA) 71 67 68 70, Mindy Kim (Kor) 68 73 71 64, Sun Young Yoo (Kor) 68 67 72 69, Sandra Gal (Ger) 72 68 69 67, Jeong Jang (Kor) 70 68 69 69
277 Pornanong Phatlum (Tha) 71 70 71 65, Jin young Pak (Kor) 69 70 69 69, Amy Yang (Kor) 68 70 68 71, Christel Boeljon (Ned) 71 68 69 69, Anna Grzebien (USA) 70 71 69 67, Nicole Hage (USA) 72 65 67 73, Suzann Pettersen (Nor) 67 70 72 68, Kris Tamulis (USA) 70 67 71 69
278 Kristy McPherson (USA) 70 72 68 68, Danielle Kang (USA) 69 73 69 67, Katie Futcher (USA) 68 67 72 71, Candie Kung (Tai) 68 72 69 69, Jennifer Johnson (USA) 69 69 71 69, Hee Young Park (Kor) 71 69 70 68
279 Min seo Kwak (Kor) 68 72 69 70, Momoko Ueda (Jpn) 68 73 72 66, Victoria Tanco (USA) 76 65 71 67
280 Jennifer Rosales (Phi) 71 68 76 65, Na Yeon Choi (Kor) 72 70 73 65, Beatriz Recari (Spa) 70 70 71 69, Karrie Webb (Aus) 75 65 72 68, Reilley Rankin (USA) 70 72 69 69, Heather Bowie Young (USA) 72 69 70 69, Katherine Hull (Aus) 70 73 72 65
281 Meena Lee (Kor) 74 68 74 65, Laura Diaz (USA) 69 70 72 70, Mina Harigae (USA) 72 70 67 72
282 Jenny Suh (USA) 69 70 74 69, Maude-Aime Leblanc (Fra) 73 68 68 73, Angela Stanford (USA) 67 71 71 73, Alena Sharp (Can) 73 70 71 68, Taylor Coutu (USA) 70 69 76 67
283 Belen Mozo (Spa) 73 70 70 70, Sarah-jane Smith (Aus) 70 73 70 70, Jennie Lee (USA) 72 69 70 72, Julieta Granada (Par) 70 72 71 70
284 Seon Hwa Lee (Kor) 68 70 73 73, Morgan Pressel (USA) 70 71 72 71, Maria Hernandez (Spa) 70 72 72 70, Leta Lindley (USA) 75 68 70 71, Isabelle Beisiegel (USA) 71 70 73 70
285 Vicky Hurst (USA) 74 66 72 73, Lacey Agnew (USA) 67 76 73 69
286 Ayaka Kaneko (USA) 73 68 70 75, Dori Carter (USA) 71 72 73 70
287 Jee Young Lee (Kor) 71 71 74 71, Michelle Wie (USA) 70 70 73 74, Rebecca Lee-bentham (Can) 72 71 73 71, Karen Stupples (Eng) 70 68 73 76, Meaghan Francella (USA) 71 72 74 70
288 Danah Bordner (USA) 73 68 75 72, Stephanie Louden (USA) 70 71 76 71, Il-hee Lee (Kor) 70 71 78 69
289 Karlin Beck (USA) 66 73 78 72
290 Angela Oh (USA) 74 68 77 71
292 Hanna Kang (Kor) 71 71 77 73
293 Lorie Kane (Can) 71 72 75 75
