Annika Sorenstam fired a 4-under-par 68 Sunday to win the Nichirei Cup, her last tournament before taking on the men in the PGA Tour's Colonial.

Sorenstam carded six birdies against a pair of bogeys at the Tokyo Yomiuri Country Club to finish with a four-day total of 13-under 275 and a nine-stroke victory over a group of six Japanese golfers, including Kaori Suzuki, who started the final round in second place.

"I feel great, it's been a great week in so many ways," said Sorenstam. "It was nice to finish with a low score. I just tried to stay focused all day and I was aiming for 15-under."