[Reuters] Open-Sharapova says she needs to be sharper

NEW YORK, Sept 6 (Reuters) - Top seed Maria Sharapova says she will have to be sharper in her next match if she is to reach the U.S. Open final.

http://go.reuters.co.uk/newsArticle.jhtml?type=tennisNews&storyID=9579135&section=news&src=rss/uk/tennisNews