Lydia Ko rode a hot start to shoot a six-under 66 in the first round of the CP Women's Open in Saskatchewan, Canada.

The Kiwi opened her round with three straight birdies and was five-under through seven holes to sit in third place.

Ko sits two shots behind leaders Ariya Jutanugarn and Mariajo Uribe who both opened with eight-under rounds of 64.

Ko is a three-time winner of the event, twice capturing the title as an amateur.