AKRON, Ohio — In his first start since winning the U.S. Open, Dustin Johnson won another World Golf Championship on Sunday.

Johnson ran off three birdies on the back nine at Firestone and closed with a 4-under 66 to win the Bridgestone Invitational. He was helped in part by a surprising collapse by Jason Day.

Day, the world’s No. 1 player, was tied for the lead when he hooked a 3-wood off the tee on the par-5 16th, hit across the fairway and tried to bend a shot around the pond. He went into the water, making double bogey.

Day did not hit a green in regulation over his last six holes.

Johnson now has three WGC titles, and goes to the British Open as the player to beat.

“It’s the first time I’ve won two tournaments in a row. I mean, that’s big,” Johnson said after his one-shot victory over Scott Piercy.

“I’m excited and looking forward to going over to the British with the golf game in good form.”

He looks like the player to beat at Royal Troon with a remarkable combination of driving, wedges and – finally – getting some putts to fall.

LPGA: Defending champion Brooke Henderson survived some tense moments on the back nine on the way to a four-stroke victory at the LPGA Cambia Portland Classic at Portland, Oregon.

The second-ranked Henderson shot a 14-under 274 after a final round 71 at Columbia Edgewater Country Club, pulling away from American Stacy Lewis, who was 10-under after a 69.

Henderson became the first back-to-back winner at Portland since Annika Sorenstam won consecutive tournaments in 2002 and 2003.

The 18-year-old is the first wire-to-wire winner at Portland since the tournament went to a 72-hole event in 2013.

EUROPEAN TOUR: Thongchai Jaidee produced an impressive display of front-running to win the French Open by four strokes, as Rory McIlroy failed to deliver a final-round surge at Sait-Quentin-en-Yvelines, France.

Starting the day with a two-stroke lead over McIlroy, the 46-year-old Thongchai birdied two of his first six holes and shot a 3-under 68 to finish on 11-under 273 at Le Golf National outside Paris, where the 2018 Ryder Cup will be staged.

For his eighth victory on the European Tour, the Thai player collected $650,000 – the biggest check of his career.

PGA: Greg Chalmers won the Barracuda Championship at Reno, Nevada, for his first PGA Tour title, eagling the final hole for a six-point victory in the modified Stableford scoring event.

The 42-year-old Australian left-hander broke through in his 386th start after entering the week as the active player with the most events without a victory.

A point ahead of Gary Woodland and needing at least a par on the par-5 18th to wrap up the victory, Chalmers made an 8-foot eagle putt after hitting a 320-yard drive and 230-yard approach. Earlier, Woodland three-putted for a bogey on 18.

Chalmers earned a two-year tour exemption and a spot in the British Open in two weeks at Royal Troon.