Jordan Spieth may be sitting proudly at the top of the world rankings but the American believes his short game needs plenty of work before he can regain the mantle of the hottest player in golf.

The 22-year-old double major winner finished tied for fifth at the European Tour's Abu Dhabi Championship on Sunday after some erratic play on the greens left him five shots adrift of compatriot and champion Rickie Fowler.

The victory in a strong field also featuring four-time major winner Rory McIlroy and world No. 6 Henrik Stenson left Spieth, already a winner in Hawaii this year, with someone to target.

Spieth climbed in the rankings with victories at last year's Masters and U.S. Open.

"I'm not satisfied if I don't have my best stuff week-to-week, even though that is not going to happen," Spieth said Tuesday ahead of this week's Singapore Open. "It still leaves me wanting more, so I come into this week trying to really improve my short game from last week as well as maintain my ball striking."