Matteo Manassero won the Maybank Malaysian Open on Sunday as Rory McIlroy faded for the second weekend in succession.
The Northern Irishman, who blew a four-shot lead in the final round of the Masters at Augusta one week ago, this time let slip a three-stroke advantage going into the final four holes of his partially-delayed third round.
Playing 27 holes in all, he ultimately finished third and questions might still be asked of the 21-year-old's mental strength following this latest setback.
Manassero, meanwhile, demonstrated his fortitude to claim his second European Tour title following on from his victory at the Castello Masters last year.
The Italian, who celebrates his 18th birthday in two days' time, was four-under-par in his final round, including an eagle three at the par-five 10th when he holed his approach.
"I had a really good week from the beginning," he said. "I didn't miss many shots apart from the second round when I didn't play great but I was still able to finish well and get in contention.
"I had a really good weekend and managed to get the win. I'm really proud of that and the next target will be winning another tournament and keeping the momentum going. It's going well and we'll see what happens,"
McIlroy was one of several players to resume their third round at 7.40am local time after lengthy rain delays on Friday and Saturday.
Starting well, he birdied on the 10th, his second in succession after closing with a three on the back nine on Saturday, leaving him in a three-stroke lead.
However, McIlroy made double-bogey at 15, allowing Manassero and Alexander Noren of Sweden to overtake him at the top ahead of the final round.
McIlroy managed seven birdies in his last 18 holes, but bogeys at five and 18 plus a double-bogey at 12 left him three under for the round and 14-under-par overall, two shots behind Manassero.
"It has been a good week, I enjoyed coming to Kuala Lumpur," he said. "I'm disappointed with the result but everything else was positive.
"I'm proud of myself at how I picked myself up from last week and the way I came back on the back nine today.
"Matteo is fantastic. He is a great talent - to get two wins on the European Tour before your 18th birthday is pretty special. He is great and we've known he is a great player. He deserves it."
Frenchman Gregory Bourdy, who is without a title since the UBS Hong Kong Open in 2009, finished second after a joint best of the day five-under-par 67.
That was matched by Spain's Rafael Cabrera-Bello, who finished in a share of fourth alongside Noren, who was one-under-par in his final round.
New Masters champion Charl Schwartzel finished in a tie for 11th thanks to a five-under-par third round, alongside Scotland's Stephen Gallacher.
Meanwhile, Englishman Simon Dyson was seventh with a final-round 68 while world number one Martin Kaymer shared a disappointing ninth place after a level-par last 18.