Not only was Jon Rahm's golf ball all over the place on a toasty Sunday afternoon at Austin Country Club - so was Rahm. Since then, Johnson has won five times and risen to No. 1 in the world. "Wasn't sure. Top four should get me in so I'm really happy".
Johnson's play over the seven rounds of the Match Play had some highs and lows.
13th green to win the hole with a birdie, stuck a wedge close on the 15th for another birdie and sank a 30-foot birdie on the next hole after hitting a shot through the trees.
On the 356-yard par four eighteenth hole, Rahm blasted a drive that went a whopping 382 yards, rolling straight through the middle of the green and coming to rest a few yards over it. Johnson played a safe iron off the tee, but wedged to the front fringe of the green, leaving himself about about 25 feet to the hole for his birdie try.
Rahm's comeback bid fell short when he was unable to birdie the 18th hole to extend the match. "If I hit the driver well then I am going to play pretty good".
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.
The reigning US Open champion won the WGC HSBC Champions in 2013, the WGC Cadillac Championship in 2015, the WGC Bridgestone Invitational in 2016 and the WGC Mexico Championship earlier this month.
The worlds number one ranked golfer continues his red hot play as he was able to beat John Rahm one-up in the championship round of the Dell Match Play.
Just as he never celebrates a birdie or bemoans a bogey, the game's top-ranked player keeps an even keel from the omnipresent hype machine that surrounds players of his caliber.
"I thought I played - I played my worse that match of any match", Haas said of his win over Tanihara.
Johnson - who did not lose a match throughout the entire competition - came up short of the green on his second shot, but two-putted to seal the victory.
But he was also made to work hard to secure the first prize of £1.3million in the final as Rahm, who was trying to become the youngest victor of a WGC event, fought back from five down after eight holes to take the contest to the 18th.
He will face a determined longshot in 38-year-old Tanihara, who dispatched England's Ross Fisher 4 and 2 in the quarter-finals after defeating England's Paul Casey 2 and 1 in the round of 16.
In the longest week of the year - seven matches over five days - and one of the toughest tournaments to win because match play is so unpredictable, Johnson delivered the outcome everyone expected Sunday at Austin Country Club.
In the playoff for third and fourth, Haas beat Tanihara 2&1, though the loser at least enjoyed a hole-in-one at the par-three seventh.
Tanihara battled Johnson in the semifinal, ultimately losing 1 UP. It's one of my favourite tournaments to play every year.
"When I practiced this course I think tee shot was most important thing, so I focused on good tee shot so that makes this good result". "I didn't really give him anything, I three-putted 10 but I didn't really give him anything".
LPGA - Mirim Lee of South Korea shot a 7-under 65 to win the Kia Classic in Carlsbad, Calif., by six strokes and tie the tournament record of 20-under.
RIO GRANDE, Puerto Rico (AP) - D.A. Points started with five straight birdies and closed with a 6-under 66 to win the Puerto Rico Open on Sunday for his third PGA Tour title. "To bounce back after kind of a rough stretch there, I'm really proud".
Retief Goosen, Bill Lunde and Bryson DeChambeau tied for second.