South Korean Ko birdied three of her final five holes for a seven-under 65 at Desert Ridge and a total of 22-under 266, to secure her third win on the main Tour.

She won when third-round leader Yu Liu missed a 15-foot par putt on the par-4 18th.

Chinese Liu carded a 70 to tie for second with playing partner Carlota Ciganda and sisters Jessica and Nelly Korda.

FINAL LEADERBOARD

Ciganda closed with a 69, Jessica Korda eagled the two back-nine par-5s in an equal Sunday best round of 64 and Nelly Korda shot a 66.

Best of the Australians was Su Oh who had nine birdies to match Korda's 64. It moved her up 32 spots and into a share of 18th at 14 under.

Oh's countrywoman, World No.3 Minjee Lee, had a 69 on Sunday to finish at seven under in a tie for 58th.