MEXICO CITY — Dustin Johnson launched a 368-yard drive at the second hole for an eagle en route to a four-stroke lead over Rory McIlroy after the third round of the WGC-Mexico Championship Saturday.

The hot start afforded the world No. 3 the luxury of maintaining a healthy buffer despite a double-bogey at the 10th hole at Club de Golf Chapultepec in Mexico City.

Johnson carded five-under-par 66 to remain on course for a second win in three years at the World Golf Championships event, and a 20th victory of his PGA Tour career.

He finished on 16-under 197 for the tournament, while Northern Irishman McIlroy, who led after the opening round, mixed seven birdies with four bogeys for a 68 to stand alone in second place.

Spaniard Sergio Garcia, Americans Patrick Reed and Patrick Cantlay and Australian Cameron Smith were a distant seven strokes back in a share of third.

Tiger Woods had problems on the greens, four-putting at the 15th and three-putting the next, to slip 10 strokes off the pace with a 70.

Not content to sit on the lead after starting the day two shots clear, Johnson hoisted his drive over a clump of trees at the par-four second and was rewarded when his ball landed near the front of the green and trundled to near tap-in range.

He made a complete mess of the par-four 10th, however, with his second shot from the rough striking a tree branch and ricocheting to the edge of a line of bushes, from where he found another tree with his third shot.

“I misjudged the lie a little bit,” he said of his second shot.

“It shot straight up in the air, hit the tree in front of me and I ended up making a double but I didn’t let it bother me because I knew I’m playing well and there were plenty of holes I could make birdie on coming down the stretch.

“I’m driving it well, really controlling distance with the irons. I feel good everywhere.”

McIlroy acknowledged it would probably be tough to catch the in-form Johnson, who two weeks ago won a European Tour event in Saudi Arabia.

Baddeley seizes lead

Australia’s Aaron Baddeley fired a bogey-free six-under par 66 to seize a one-stroke lead after Saturday’s third round of the US PGA Puerto Rico Open.

The 37-year-old Aussie, seeking his fifth tour triumph and first since the 2016 Barbasol Championship, stood on 12-under 204 after 54 holes at Rio Grande.

American Nate Lashley birdied the 18th hole to grab second alone on 205, one stroke ahead of countryman Martin Trainer at the event, played while most of the world’s top talent competes this week at the WGC Mexico Championship.

Baddeley, whose best finish this season was a share of fourth at the campaign-launching Safeway Open last October in California, is excited about his chances.

Baddeley opened with back-to-back birdies, a wedge on his approach at the par-5 second the key shot there.

He followed with birdies at the par-5 fifth, par-4 ninth, par-3 11th and par-5 15th.

Lashley and Trainer hope to capture their first PGA titles.

Lashley sandwiched an eagle between bogeys at the first and third holes, then birdied the ninth and answered a bogey at 11 with birdies at 12 and 13 ahead of his closing birdie. — Agencies