(REUTERS – September 12th) Sam Stosur became the first Australian woman in 38 years to win the U.S. Open when she upset American Serena Williams6-2 6-3 yesterday in an ill-tempered final.

Stosur played the match of her life to defeat the most formidable player of her generation and capture her first grand slam title, spoiling American hopes of a home-bred champion on the 10th anniversary of the Sept. 11 attacks.

Williams, bidding for a fourth U.S. Open crown, failed to reproduce her best after sailing to the final without dropping a set and let her frustrations boil over. Throughout the second set she repeatedly argued with the chair umpire in a petulant display that rekindled memories of her ungracious exit from the 2009 U.S. Open.

While Williams berated the official, Stosur remained a model of composure. The 27-year-old dominated the match from the outset and fully deserved her win, played in front of a raucous Arthur Ashe Stadium crowd.

Stosur, one of the fittest and biggest-hitting players in the women’s game, put Williams under pressure from the outset with some thunderbolt returns that pinned the American behind the baseline and attacked her backhand, forcing her to make errors. Stosur broke Williams’s serve twice in the first set, which she wrapped up in 31 minutes, then three times in the second while losing her own serve once.

Williams went into the match as the overwhelming favourite despite having not played at Flushing Meadows since her foul-mouthed tirade in 2009 that earned her a hefty fine and a two-year probation.