Laura Robson crashes out of U.S Open

Laura Robson hits a return to Stosur during their singles match at the U.S. Open Credit: Gary Hershorn / Reuters

Laura Robson's U.S Open quest has been ended by Australia's Sam Stosur, who won in straight sets.

Stosur needed nine match points to finally end Robson's run, winning 6-4, 6-4. The seventh seed closed out the match when she came in for a ball that ticked the net and knocked an unreturnable shot deep to Robson's forehand.

Robson, who had previously knocked out four-time Grand Slam titlist Kim Clijsters and 2011 French Open champion Li Na, tried to get back in the match after falling down 5-2 in the second set, but her 41 unforced errors turned out to be too much to overcome