Tony Finau claimed his sixth PGA Tour title and fifth in the last 20 months with a highly impressive victory in the Mexico Open.

A year after finishing runner-up to Jon Rahm at Vidanta Vallarta, Finau reversed those positions thanks to a flawless closing 66.

At 24 under par, Finau finished three shots clear of world number one Rahm, with Brandon Wu – who was joint second with Finau 12 months ago – two strokes further back in third.

“It feels amazing,” Finau told CBS. “Rahmbo’s the best, he’s on top of the world right now.

“I knew I was going to have my hands full with him all the way till the end and I didn’t know this golf tournament was mine until I just hit this green (the 18th) here.

“It’s crazy how this game is, you never think you have a tournament won until it’s over so it feels great and we’re going to enjoy this one with my family.”

Rahm, who had carded a course record of 61 in round three, was chasing a fifth win of the year and the Masters champion kept his outside chance alive with a fourth birdie of the day on the 15th, only to bogey the 17th after his tee shot plugged in the bank of a greenside bunker.

Finau began the day with a two-shot lead and immediately extended it with a birdie on the first, but was caught at the top of the leaderboard when Wu followed two early birdies with an eagle on the sixth and another birdie on the next.

However, Finau responded with a birdie of his own on the short seventh and Wu’s chances effectively disappeared when he drove into the water on the 10th to run up a double bogey.

Finau birdied the 11th and 14th to give himself some welcome breathing space and parred the last four holes to round off a brilliant week.

Jon Rahm shot a course record 61 as his bid for a fifth win of the year moved up a gear in the third round of the Mexico Open.

The Masters champion went out in 29 to move within two of leader Tony Finau.

Akshay Bhatia, playing in just his sixth PGA Tour event, will join the tournament’s big two names in the final group after equalling the previous Vidanta Vallarta course record of 63 to sit alongside Rahm on 17 under.

Rahm, who hit 17 greens in regulation, had the chance of a rare 59 but missed birdie putts on 15 and 16 before seeing his drive at the 18th plug in a fairway bunker as he had to settle for a par.

He said following his round: “It was a great round. The swings didn’t feel that different today to the first two days. The first two rounds, a couple of the not-so-good swings cost me a little bit too much

“Today, everything just seemed perfect. Made a lot of great swings and the ones that weren’t great, still gave myself a good result.”

The world number one needed just 25 putts as he equalled his career-low round.

“I think that’s the difference usually in a course like this,” he said. “To get to 10 under you’re going to have to make a few lengthy ones, and combined with really good ball-striking, great round. Really happy with what I did and just glad I gave myself a chance.”

Rahm, who is looking to defend a PGA title for the first time, could become the first player with five wins on the tour before May since Johnny Miller in 1974.

Finau, the only other member of the world’s top 20 in the field, birdied five of his last seven holes as he carded a 65 to maintain his lead heading into the final round.

Rahm, who beat him to the title 12 months ago, briefly edged ahead before the American’s strong finish.

Bhatia, 21, leapfrogged into the final group with an eagle on the last having played a practice round with Rahm and Finau earlier in the week.

Brandon Wu, who was second alongside Finau last year, is a shot further back and the only other person within five strokes of the lead.

Ben Taylor edged into the top 10 with a 66, two better than fellow Englishman Harry Hall.