Felipe Aguilar produced a stunning 2-2 finish as he came home in 28 shots to snatch The Championship at Laguna National from Anders Hansen.
The Chilean sunk a ten foot birdie putt at the daunting par three 17th after his tee shot barely carried the water, then holed his approach for eagle at the last as a closing 62 saw him finish on 22 under par in Singapore.
Hansen spent much of the day on course for a first European Tour win in five years, but after failing to get up-and-down from sand at the 16th the Dane required a birdie from the last two holes and could not find one.
“Yesterday I didn’t have a good round and you figure that you’re so far back that you have no chance,” said Aguilar.
“But today after the front nine I shot two under I knew I had to go deep and I hit the ball one of the best times I ever have and I went for every single pin.
“On the 17th green I told my caddie if I make a birdie on 18 I might put some pressure on the leader and he said ‘you might make two’. I looked at him and said ‘the way I’m hitting the ball I might make two’, and I did.
“I didn’t think I had made it until my caddie came back and told me and the others congratulated me. That was the cherry on the cake, definitely.”
Ireland’s Simon Thornton and Peter Lawrie tied for 20th on 12 under par.
Ballyclare’s Gareth Maybin carded his worst round of the week, a three over 75 that saw him slip down the leaderboard to finish tied for 54th on five under par.
The 43 year old Hansen surged four shots clear on the front nine. The three-time European Tour winner had to overcome a bogey at the first after missing a par putt.
However, pitches to three feet at the second and third set up birdies and a 20 foot putt at the fourth completed a hat-trick of gains.
Hansen picked up further shots from five feet at the sixth and 12 feet at the seventh to go four clear, but American David Lipsky responded with gains at the eighth and ninth to bring the gap back down to two.
Aguilar turned in 34 after birdies from 15 feet at the fifth and ten feet at the eighth, but set off for home with four straight gains.
The Chilean, whose only previous European Tour title came in neighbouring Indonesia six years ago, joined Lipsky in second as a result – but both were three behind when Hansen holed form 15 feet on the 12th.
Both Aguilar and Hansen birdied the long 15th, but the former’s incredible finish left the Dane needing another gain over the closing stretch.
Hansen then bogeyed the 16th from the sand, and despite holing a four foot clutch putt for par at the next, missed the green at the last and had to settle for par and a closing 67.
That saw him tie for second with Lipsky, who signed for a closing 65, with India’s Rahil Gangjee fourth on 19 under after birdieing his last five holes.