SINGAPORE - World No. 1 golfer Jordan Spieth has arrived in Singapore to compete in the Singapore Open for the first time.

On Monday morning, the top-ranked American touched down at Changi Airport after an eight-hour flight from Abu Dhabi where he had competed in the Abu Dhabi HSBC Championship.

The 22-year-old, who won two Majors last year and opened this season with a victory at the Hyundai Tournament of Champions earlier this month, closed with a four-under 68 and 277 total to finish joint-fifth on Sunday in the European Tour event in the Middle East.

It was won by compatriot Rickie Fowler, who finished five shots ahead of Spieth.

Speith, who headlines the US$1 million (S$1.44 million) SMBC Singapore Open held this week at the Sentosa Golf Club, looked tired as he waited for about 25 minutes to collect his luggage at Terminal 2.

His fatigue is unsurprising, given his worldwide schedule over the past three months that has seen him play in South Korea, China, Australia, Bahamas, Hawaii and Abu Dhabi.

He had told Golf Channel after his round on Sunday: "We are kind of beat up mentally. Physically, we're not 100 percent right now. It shows in certain places, and this week, the first day I was here, I was striping it and since then, I was just a little weak."

He added: "[After Singapore] I'll get back to the [PGA] Tour schedule and re-evaluate how next season will finish up into the New Year.

"[Singapore is] an event that we've kind of had our mind on for a year or two and thought it might work out on a trip around the world here, go this way and just kind of puddle-jump over there I guess and go home.

"I'm excited to get home. I'm excited for rest. But next week will be fun."