NEW YORK, Sept. 11 -- Aussie Samantha Stosur beat Serena Williams to win the US Open and also her first Grand Slam tennis title on Sunday.

The 27-year-old Stosur become the first Australian woman in 31 years to capture a major singles championship.

Ninth seed Stosur overpowered the 28th-seeded Williams 6-2, 6-3 through one hour, 13 minutes.

She's the third straight women's player to capture her first major this year after China's Li Na took the French Open title and Petra Kvitova of the Czech Republic won Wimbledon.

"I think I had one of my best days," Stosur said. "This was a dream of mine to be here one day, and I don't really know what to say and how I'm feeling."

Williams, whose previous appearance at the U.S. Open in a 2009 semifinal loss ended with a foot fault and a penalty point when she threatened a lineswoman, had more controversy in today's final.

She lost a point, and a service game, in the second set because she yelled "Come on!" before the point was over. She faced a break point on her serve when she slammed a forehand that Stosur barely tipped as it shot past her.

Match umpire Eva Asderaki cited Williams for a verbal hindrance because she shouted before Stosur had a chance to swing at the ball. The point, and first game of the second set, went to Stosur.

Williams had a contentious discussion with chair umpire that included Williams saying, "If you ever see me walking down the hall, look the other way."

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