AUSTIN — You don’t mess with Texas.

Tangling with Dustin Johnson isn’t wise, either.

The world No. 1 beat up Austin Country Club and handled seven opponents en route to winning the World Golf Championships-Dell Technologies Match Play. He capped his week by winning two tight tussles on Sunday, digging deep to beat Hideto Tanihara, 1 up, in the semifinals, and then rookie Jon Rahm, 1 up, in the finals on a sun-drenched Sunday by the Colorado River.

“I’m playing pretty well,” said Johnson, a man of few words who has become an overpowering presence with his length, iron play and putter. “Today was a tough day, a really long day. I’m proud of the way I played.

“Obviously I’ve got a lot of confidence in my game.”

SCORES: WGC-Dell Technologies Match Play

For more than a year now, everything has been working for Johnson, who has six wins – including last year’s U.S. Open – two seconds, two thirds and four other top-10s in his last 18 starts worldwide. In the Lone Star State, his firepower was so assertive he didn’t trail in any match (he played 112 holes), won the first hole six of seven times, and reached the 18th hole just twice all week. And the few times his matches got tight, Johnson kept his opponent at bay. He was 4 up with six to play but wasn’t unnerved when Rahm won three of the next four holes, closing out with a par on the final hole.

“It’s amazing how he’s able to keep cool the entire round,” said Rahm, who beat Bill Haas, 3 and 2, in the semis. “He’s just a perfect, complete player.”

In addition to beating Rahm and Tanihara, Johnson topped major champions Webb Simpson, Martin Kaymer, Jimmy Walker and Zach Johnson. He also beat Alex Noren in the round of 16.

The win was Johnson’s second in a row in a WGC event – he won the Mexico Championship three weeks ago — and his third in the last four played. He also became the first player to win all…