Dustin Johnson didn’t flinch when a challenge arrived out of nowhere Sunday, playing mistake-free over the final five holes to win the Mexico Championship in his debut as the No. 1 player in the world.
Johnson’s four-shot lead going to the back nine turned into a one-shot deficit when Spanish rookie Jon Rahm ran off an eagle and two birdies at Chapultepec Golf Club. Johnson caught him with a birdie on the par-5 15th, and closed with three solid pars for a 3-under 68.