Yuka Saso birdied the third playoff hole to beat Nasa Hataoka and become the second teenager to win the U.S. Women's Open after Lexi Thompson collapsed down the stretch.

Saso overcame back-to-back double bogeys early in the round to make the playoff. She then won it with a 10-foot putt on the ninth hole to become the first player from the Philippines to win a golf major on Sunday.

Saso matched 2008 winner Inbee Park as the youngest U.S. Women's Open champion at 19 years, 11 months, 17 days.

Both players made pars at Nos. 9 and 18 in the two-hole aggregate playoff, sending the tournament to sudden death back at the ninth hole. That set the stage for Saso to win it just up the road from Daly City, dubbed the Pinoy Capital of the United States for its large population of Filipinos.

Thompson, who had a five-stroke lead after the eighth hole, played the final seven holes in 5 over for a 75 that left her a stroke back. Her approach shot on the par-4 18th ended up in the bunker and then she missed a 10-foot putt to make the playoff.

The only other players to finish under par on the Lake Course at Olympic Club were Megan Khang and Shanshan Feng, who both were at 2 under.

High school junior Megha Ganne played in the final group but shot 77 and finished 3 over as the low amateur for the tournament.

Saso overcame a rough start to the final round with double bogeys on the second and third holes that seemed to knock her out of contention but she managed to steady herself with a birdie at No. 7.

Saso then made back-to-back birdies on the par-5 16th and 17th holes to get to 4 under and join Hataoka in the playoff. Hataoka used a run of three birdies in a four-hole span on the back nine that put pressure on Thompson.