[Rusty Backhand]

NEW YORK, Sept 11 (Reuters) - Beating Andre Agassi to retain his U.S. Open title ranks among Roger Federer's most treasured grand slam experiences, the Swiss said on Sunday.

http://go.reuters.co.uk/newsArticle.jhtml?type=tennisNews&storyID=9619309&section=news&src=rss/uk/tennisNews