FINAL LEADERBOARD GB and Ire unless stated -7 G Fernandez-Castano (Spa) *, H Stenson (Swe) -6 C Montgomerie, F-L Lima (Por) -5 M Pearce (NZ), S Dyson, P Casey Selected others: -3 P Lawrie -2 B Lane * Fernandez-Castano wins at first extra hole

Stenson, who led after each of the first three rounds at the Tomson Pudong Golf Club, birdied the last to tie with Fernandez-Castano on seven under.

But the Swede could only par the first extra hole, the 18th, allowing the 2005 European Tour rookie of the year to take the title with a birdie.

Scotland's Colin Montgomerie finished one shot adrift of the leaders.

He was tied with Portugal's Jose-Filipe Lima on six-under after firing a 68, followed by New Zealand's Mahal Pearce and English duo Simon Dyson and Paul Casey, who all finished on five under.

The $1.8m tournament was co-sanctioned by the European and Asian Tours.

I felt pretty happy to be in the play-off after everything that happened Henrik Stenson

Stenson had looked set for victory after opening up a three-stroke lead midway through his final round.

But a triple-bogey eight at the ninth hole, when he hit a tree and blew two shots trying to escape the rough, halted his progress.

After another birdie and a bogie, he eventually carded a one-under-par 71.

"I felt pretty happy to be in the play-off after everything that happened," said the Swede.

Fernandez-Castano shot a two-under-par 70, carding two birdies in a bogey-free round, to force the play-off.

By claiming his second title - he won last year's KLM Open in Holland - Fernandez-Castano also became the youngest winner of the Asian Open since its inception in 2001.

When you see the leaderboard, all the players I've beaten today, it's unbelievable Gonzalo Fernandez-Castano

He comfortably beat Padraig Harrington's record of 31 years and 85 days.

"It's been a great day, one I will always remember," he said. "When you see the leaderboard, all the players I've beaten today, it's unbelievable."

A beautiful chip in from 30 yards at the 16th, combined with a bogey for Stenson, saw Fernandez-Castano top the leaderboard for the first time on a day when the lead changed hands several times.