Golf: Dustin Johnson wins in Mexico to cement world No. 1 ranking

Dustin Johnson of the United States with his trophy after winning the World Golf Championships Mexico Championship at Club De Golf Chapultepec on Sunday (March 5).
Dustin Johnson of the United States with his trophy after winning the World Golf Championships Mexico Championship at Club De Golf Chapultepec on Sunday (March 5).PHOTO: AFP

ACAPULCO (REUTERS/AFP) - Dustin Johnson surrendered a big lead before cementing his world No. 1 ranking with a one-stroke victory at the WGC-Mexico Championship in Mexico City on Sunday.

The American built a four-stroke advantage on the back nine before giving it all up to young Spaniard Jon Rahm at Club de Golf Chapultepec.

But Johnson, after back-to-back bogeys, avoided any further dropped shots in a three-under 68, tapping in at the last from a few inches.

He finished at 14-under 270 for his second consecutive victory, after winning at Riviera in California two weeks ago.

Englishman Tommy Fleetwood (66) birdied the last to claim second place on 13-under, while Rahm faded late to tie for third with Englishman Ross Fisher on 12-under.

Overnight leader Justin Thomas faltered with a 72 to finish three strokes behind, equal fifth.

Four-time Major champion Rory McIlroy, who could have overtaken Johnson atop the rankings with a victory, fired a 71 to share seventh with Americans Phil Mickelson and Brandt Snedeker on 274.

Johnson has now won 14 times on the PGA Tour, including four victories in World Golf Championships events.