Song Young-han holds off Jordan Spieth to win Singapore Open

Spieth on course for long journey (1:27)

ESPN's Bob Harig discusses Jordan Spieth challenging schedule ahead after finish second at the Singapore Open. (1:27)

SINGAPORE -- Jordan Spieth finished runner-up at the Singapore Open on Monday, after South Korea's Song Young-han held his nerve to beat the fast-finishing world No. 1 by a single stroke.

Among 13 players at Sentosa Golf Club at the break of dawn, after Sunday's final round was suspended because of a thunderstorm, Spieth sank a 5-foot birdie putt on the last hole, on which he had marked his ball overnight, to complete a final round of 5-under 66 and finish at 11-under 273.

Song, resuming at 12 under and playing two groups behind Spieth, drained a tricky, 12-foot par putt on the 16th, then made par on the last two holes to win the co-sanctioned Asian and Japan Tour event.

China's Liang Wen-chong, who completed his final round Sunday, finished outright third at 10 under.

"I had my first perfect round today," Spieth joked of 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."

Ranked 204th in the world, Song led the tournament from the second round and was 5 shots in front of Spieth heading into the final round. But he had to retain his composure in the closing stages as the American narrowed the gap.

The 24-year-old said he had a restless night thinking about the putt on 16 and spent hours practicing the shot in his hotel room.

"I felt like I was going crazy," he said through a translator. "The putting line wasn't that bad, but the situation made me nervous."

Normally one of the best putters in the game, Spieth struggled on the greens all week in the stifling humidity of Southeast Asia. But the 22-year-old got his game together in the final round to mount a late challenge and reel in six birdies to put pressure on Song, who was chasing his first win as a professional after two second-place finishes on the Japan Tour.

Song managed just two birdies in his final round of 70 and dropped a shot on the seventh after an erratic drive, but he made a string of clutch saves to par the last seven holes and finished with a simple tap-in at the 18th to secure the title and deny Spieth a playoff.

"I fought hard in the final round, but I was just a little bit too far back," Spieth said. "I missed a few putts [earlier in the tournament] that I normally make. I had a lot of tough breaks. You have them both ways, but this was one week where we definitely got the bad end of some bounces.

"My game's pretty close. I held it together pretty solid, but I didn't have as many looks as I normally have on a weekly basis, and that led to a little bit of a lack of trust in the reads."