South Korea's Song Young-han held his nerve to beat the fast-finishing Jordan Spieth by a single stroke at the weather affected Singapore Open.
Spieth sank a five-foot birdie putt on the last hole, where he had marked his ball overnight, completing a final round of five under 66 to finish at 11 under for the tournament.
"I had my first perfect round today," Spieth joked about his one-shot day.
"Everything was absolutely perfect. I didn't miss one shot and I made everything I looked at.
"It was tough to sleep on that putt. Even though it wasn't the most challenging putt, it was still a very nerve-wracking one to hit, knowing that you have to make it for what you think will be a playoff."
However, Song, resuming on 12 under and playing two groups behind Spieth, drained a tricky 12-foot par putt on 16 and then made par on 17 and 18 to win the co-sanctioned Asian and Japan Tour event.
The 24-year-old champion said he had a restless night thinking about the putt on 16 and spent hours fretting over the shot in his hotel room.
"I felt like I was going crazy," he said, speaking through a translator.
"The putting line wasn't that bad but the situation made me nervous."
He has good memories of Harding Park and is hoping he can be in contention for a second major title.
The American pair opened strongly on Sunday to eke out a gap on the chasing pack.
DeChambeau’s physical transformation has been the main talking point since golf’s return to action following the coronavirus shutdown.
Sam Horsfield was literally lost for words after his maiden European Tour win.
The American sits atop the leaderboard despite a mixed third round on Saturday.
The Englishman saw a commanding lead cut after a stuttering back nine.
Brooks Koepka made a not-so-subtle dig at Bryson DeChambeau’s “anthill” moment from the first round in Memphis.
The tournament marked the resumption of the tour.
Horsfield fired an eagle and seven birdies in a second round of 63 at the Forest of Arden to share the halfway lead with Sebastian Garcia Rodriguez.