Australia's Hannah Green overcame a three-shot deficit with a final round 5-under 67 Sunday to win the Portland Classic and deny teenager Yealimi Noh's bid to become the third Monday qualifier to win on the LPGA Tour.

Green erased a three-shot deficit with two birdies over the final four holes at Columbia Edgewater Country Club. She finished at 21 under and won for the second time this season. She claimed the KPGM Women's PGA Championship in June.

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Yealimi Noh hits her tee shot on the sixth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Australia's Hannah Green overcame a three-shot deficit with a final round 5-under 67 Sunday to win the Portland Classic and deny teenager Yealimi Noh's bid to become the third Monday qualifier to win on the LPGA Tour.

Yealimi Noh, left, and Hannah Green of Australia (R) chat as they wait to hit their tee shots on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

The 22-year-old Green closed within two strokes with a birdie at the 15th and was within one after Noh made bogey at No. 16. Green forged a tie at 21 under with a birdie at the 17th. She made par on the 72nd hole and Noh dropped out of a tie for the lead with a bogey.

Hannah Green, of Australia, hits her tee shot on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Hannah Green, of Australia, hits her tee shot on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Brookes M. Henderson of Canada hits her tee shot on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Brookes M. Henderson of Canada hits her tee shot on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Dana Finkelstein hits her tee shot on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Dana Finkelstein hits her tee shot on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Yealimi Noh hits out of a bunker on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Yealimi Noh hits out of a bunker on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

The 18-year-old Noh, who turned down an offer to play for UCLA and instead went pro in February, led by three strokes entering the final round and held the same margin after 14 holes. But, she struggled down the stretch and settled for a final-round 71 and 20 under.

Yealimi Noh hits her tee shot on the sixth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Yealimi Noh hits her tee shot on the sixth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

The 22-year-old Green closed within two strokes with a birdie at the 15th and was within one after Noh made bogey at No. 16. Green forged a tie at 21 under with a birdie at the 17th. She made par on the 72nd hole and Noh dropped out of a tie for the lead with a bogey.

Brittany Altomoare carded a 69 and finished third at 17 under. Canadian Brooke Henderson (71) and Nasa Hataoka (66) tied for fourth at 15 under.

Yealimi Noh, left, and Hannah Green of Australia (R) chat as they wait to hit their tee shots on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Yealimi Noh, left, and Hannah Green of Australia (R) chat as they wait to hit their tee shots on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Hannah Green, of Australia, hits her tee shot on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Hannah Green, of Australia, hits her tee shot on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Brookes M. Henderson of Canada hits her tee shot on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Brookes M. Henderson of Canada hits her tee shot on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Dana Finkelstein hits her tee shot on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Dana Finkelstein hits her tee shot on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Yealimi Noh hits out of a bunker on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)

Yealimi Noh hits out of a bunker on the fifth hole during the final round of the LPGA Cambia Portland Classic golf tournament in Portland, Ore., Sunday, Sept. 1, 2019. (AP PhotoSteve Dykes)