of Australia will be aiming to regain her form from earlier in the season this week at the US Open in Flushing Meadows New York.
The Australian caused a huge shock 2 months ago when she beat the 4 time French Open champion Justin Henin in 3 sets in the 4th round at this years French Open, and she backed that up with a 3 sets win over the world number 1 Serena Williams.
Stosur also beat former world number 1 Jelena Jankovic in the Semi Finals in straight sets but she was beaten in the final.
Last year Kim Clijsters of Belgium won the US Open for the 2nd time in her career as a wild card when she beat Caroline Wozniacki in the final in straight sets 7-5 6-3.
World Number 1 Serena Williams last won the title in 2008 when she beat Jelena Jankovic in the final in straight sets.