LOS ANGELES — Dustin Johnson went to No. 1 in the world with a world-class performance at Riviera.

Johnson turned a marathon finish into a Sunday stroll in the Genesis Open. He finished the third round in the morning with a 7-under 64 to build a five-shot lead, stretched it to nine shots at one point in the final round and coasted home to a 71 and a five-shot victory.

Johnson became the 20th player to reach No. 1 since the world ranking began in 1986, ending Jason Day's 47-week stay at the top.

Johnson won for the fourth time against some of golf's strongest fields dating to his U.S. Open victory last summer. All he cared about Sunday was winning at Riviera, one of his favorite courses where he has had chances in four of the last five years.

Three-shot victory for Jang in Australia

ADELAIDE, Australia — Ha Na Jang had an eagle and three birdies in the last six holes to pull away for a three-shot victory in the Women's Australian Open.

The South Korean player closed with a 4-under 69 to finish at 10-under 282 at Royal Adelaide. She won for the fourth time on the LPGA Tour.

Nanna Madsen of Denmark was second after a 73.

Bogey-free round gives Couples the edge

NAPLES, Fla. — Fred Couples won the Chubb Classic for his 12th PGA Tour Champions title and first since 2014, rallying to beat Miguel Angel Jimenez at TwinEagles.

The 57-year-old Couples shot a bogey-free 5-under 67 to finish at 16-under 200 on the Talon Course, three strokes ahead of second-round leader Jimenez.

Rumford wins first World Super 6 title

PERTH, Australia — Australia's Brett Rumford beat Thailand's Phachara Khongwatmai 2 and 1 in the final match to win the first World Super 6 title.

Rumford led by five strokes at 17-under 199 after 54 holes of stroke play in the experimental golf tournament at Lake Karrinyup that was sanctioned by the European, Asian and Australasian tours.

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