Katherine Hull claimed her first career LPGA Tour title after a three-under-par final round earned a one-stroke win at the Canadian Women's Open on Sunday.
Hull fired a 69 to move to 11-under 277, one shot ahead of second-placed Se Ri Pak, while Yani Tseng, who entered the day with a four-stroke advantage, stumbled to a 77 and finished third on nine-under-par.
Hull had three birdies on the front nine and added one more coming in. She had just one bogey, playing steady golf while Pak and Tseng did anything but.
Pak birdied the final two holes for an even-par 72, but was just not able to overcome her mistakes. She bogeyed holes four and five and then carded a double-bogey at the par-five sixth.
She had three birdies in four holes starting at the seventh to get back in the hunt but a bogey at 16 ultimately left her a little short.
Tseng started her round with a big lead but wasted little time giving it all back. She had five bogeys, including three straight on the front nine, a double-bogey and just two birdies.
Tseng was looking for her second win of the season after triumphing in the LPGA Championship and was coming off a second-place finish at the Women's British Open.
Looking to defend her title, Lorena Ochoa shot 73 and finished tied for fourth at seven under. The world's top-ranked player, Ochoa was looking for her seventh win.
Michelle Wie closed with a 71 to finish tied for 12th at three under.