Samantha Stosur out-played three-time champion Serena Williams 6-2, 6-3 to win the US Open on Sunday, claiming the first Grand Slam title of her career in a stormy final. Stosur kept her composure as Williams erupted in anger at the chair umpire in the second set, dominating the 13-time Grand Slam champion who had reached the final without dropping a set. She became the first Australian woman to take the title in New York since Margaret Court in 1973, and the first to win a Grand Slam since Evonne Goolagong won Wimbledon in 1980. “I had one of my best days and I’m very fortunate that I had it on this stage in New York,” Stosur said.Stosur, playing her second career Grand Slam final after a runner-up finish in the French Open last year, quickly claimed the opening set, breaking Williams to lead 2-1 and winning the last 12 points of the set as Williams’ frustration grew. Williams struggled to get her first serves in and Stosur repeatedly made her pay. Williams saved one with an ace, and appeared to save another for deuce. But the American’s shout of “c’mon” as soon as she unleashed her forehand came before Stosur reached the ball, and umpire Eva Asderaki immediately penalised Williams for “intentional hindrance” and the point and the game went to Stosur.“Aren’t you the one who messed me over last time?,” Williams bellowed at Asderaki. “That is totally not cool.” Williams continued to berate Asderaki on the changeover, but Stosur stayed calm and saved two break points in the fourth game to level the set at 2-2.Stosur said she didn’t really know just what was happening between Williams and the umpire.