Ko astounded the golf world last month by reaching number one at the age of just 17 — the youngest by any male or female player — smashing the record set by Tiger Woods at 21.
"It's pretty awesome to be number one and I will enjoy every minute of it," said Ko. "But there have always been a lot of expectations on my shoulders even when I was an amateur. I just want to go out there and have fun."
Back-to-back wins at the Australian Open and New Zealand Open have lifted expectations still higher, but Ko will be against a strong line-up at Sentosa Golf Club, which includes Paula Creamer, whose incredible 75-foot putt secured victory in a play-off last year.
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