Gaganjeet Bhullar scripted a sensational come-from-behind victory at the season-opening Asian Tour International on Sunday.

Going into the final round six shots off pace after three successive rounds of 71, the 21-year-old Kapurthala pro seemed to have reserved his best for last as he blasted a course record eight-under 64 to aggregate 11-under 277 and nix Hwang Inn-choon's (69) title bid in the USD 300,000 event in Bangkok.

This was Bhullar's second Asian Tour title, following his breakthrough win in last year's Indonesian President Invitational tournament, which marked him as one of Asia's brightest prospects.

It was a flawless display by the youngster who parred the opening hole before an eagle flew off his club on the par-five second hole at the Suwan Golf and Country Club.

That set the tone for a sparkling round and the Indian maintained the tempo.

Two par shots later, he reeled off a birdie hat-trick and nailed a birdie on the ninth hole as well to lie six-under at the turn.

On his way back, Bhullar birdied the 15th and 18th as well, while ensuring it was a bogey-free round, to make it a dramatic come-from-behind triumph.

"It's amazing. I have no words to describe it, I'm totally speechless," a beaming Bhullar later said.

"When I woke up this morning, I just wanted to shoot a good number. I never ever thought I was going to shoot a 64 and win by one. It's like a dream coming true. My first event of the year and winning at the start of the season will give me a lot of confidence," said Bhullar, who pocketed USD 47,550 for his exploits.

"After 15 where I made a good curling putt, I told myself to make par on 16 and 17 and make a birdie on 18.

"Everything happened the way I decided. On 18, it was amazing.

"I told myself that the putt was to win the tournament.

"It was a crucial one as I had missed the same putt last two days from the nearly same line. I had a bit of an idea that it would come from the right. I just got lucky. I'm sure my confidence will go up a long way," said the youngster.

"I'm looking forward to next week (Avantha Masters in Gurgaon). It's a big event and I love the DLF course as I've won there twice (on the local circuit). Going back to play in front of the home crowd will give me a great sense of achievement," added the youngster.

Korea's Hwang Inn-choon signed for a 69 for second place.

Hwang turned in 33 to lead the field by one but rued costly mistakes on 11 and 17. "I don't know what happened with those dropped shots. I kept finding the hazard."

"On 11, I tried to hook my ball around the tree but it went straight into the water and then the same thing again on 17 when I hooked my drive into the water," he said.

"I knew I needed an eagle to force a play-off at the last and I hit a good utility wood into the green but had a really tough and long putt. There was no pressure at all and I guess 64 was a really good score by Gaganjeet".

Japan's Tetsuji Hiratsuka, runner-up last year, took third place with a 68 while overnight leader Kiradech Aphibarnrat of Thailand carded a disappointing 73 to finish tied fourth with Jbe Kruger of South Africa, three behind the winner.

The burly Kiradech, who had held at least a share of the lead from the opening round, cut a forlorn figure after staggering home with two birdies, one bogey and one double bogey as his hopes of a maiden title vanished.

"I played some good golf and hit many good shots. I made some good putts but kept missing the lines. My caddie and I couldn't read some lines."

"On the 16th hole, I was thinking of attacking the pin which was in a difficult location. We were coming down the last few holes and I wanted to do the something. Finishing third, fourth or fifth is the same as my goal was to win the tournament," said the 20-year-old.