SAMMAMISH, Wash. — Brooke Henderson beat top-ranked Lydia Ko with a birdie on the first hole of a playoff Sunday in the KPMG Women’s PGA Championship after overcoming a three-shot deficit on the back nine.

The 18-year-old Canadian, ranked No. 4 in the world, closed with a bogey-free 6-under 65 – the best round of the week – to match Ko at 6-under 278. Ko finished with a 67.

In the playoff on the par-4 18th, Henderson hit her second shot from 155 yards to 3 feet, while Ko’s second from farther back in the fairway left her with 20 feet. Ko missed to the left, and Henderson tapped in to cap a week that started with a hole-in-one on her fourth hole of the tournament and ended with a major championship.

In regulation, Henderson saved par on 18 with a 12-footer, moments before Ko missed a 4-foot birdie try on the par-3 17th. Henderson also made a long eagle putt on the par-5 11th and birdied the par-3 13th.

Henderson won last August in Portland, Oregon, for her first tour title.

Henderson became the second-youngest winner in a major championship, with Ko the youngest last year in the Evian Championship in France. Henderson also ended the 19-year-old Ko’s bid for her third straight major victory.

Ariya Jutanugarn, who won her previous three tournaments, shot a 66 to finish a stroke back. The 20-year Thai player missed a birdie putt on the 18th that could have put her into the playoff.

PGA: Daniel Berger won the FedEx St. Jude Classic for his first PGA Tour title, shooting a 3-under 67 in Memphis to hold off Phil Mickelson, Steve Stricker and Brooks Koepka by three strokes.

The 23-year-old Floridian had never been in a final pairing until Sunday. When Mickelson, with his 42 career PGA Tour titles, closed within a stroke, Berger birdied three of his next four holes, highlighted by a 32-foot putt on the par-3 14th.

Berger finished at 13-under 267. He became the 13th first-time winner on tour this season and took home the winner’s check of $1.1 million in the 50th start of his career.

CHAMPIONS TOUR: Bernhard Langer won the Constellation Senior Players Championship for the third straight year, holing a 12-foot birdie putt on the final hole for a one-stroke victory at windy Philadelphia Cricket Club.

The 58-year-old German star won his seventh senior major title – his fifth in the last 11 majors – to tie Hale Irwin for second place on the career list, a victory behind Jack Nicklaus.

Three strokes ahead at 2 under entering the round, Langer closed with a 3-over 73 to finish at 1-over 281 – the highest winning score in the history of the event first played in 1983. Mark O’Meara had the previous record at 7 under in 2010 at TPC Potomac in Maryland.

Langer edged Miguel Angel Jimenez and Joe Durant, saving bogey with a 6-footer on the par-4 17th and getting his birdie putt to drop on the par-4 18th after it caught the edge and circled the cup. Jimenez and Durant each shot 68 for the low rounds of the day.

EUROPEAN TOUR: China’s Wu Ashun rallied to win the Lyoness Open for his second European Tour victory, in Atzenbrugg, Austria.

Wu closed with a 3-under 69 for a one-stroke victory over Spain’s Adrian Otaegui. Wu finished at 13-under 275.