[Rusty Backhand]

NEW YORK, Sept 7 (Reuters) - An ultra-confident Mary Pierce declared she was playing the best tennis of her career after she reached the U.S. Open semi-finals for the first time on Wednesday.

http://go.reuters.co.uk/newsArticle.jhtml?type=tennisNews&storyID=9590264&section=news&src=rss/uk/tennisNews