Tennis Articles
Article 1
http://www.historyoftennis.net/history_of_tennis.html
Article 2
http://www.playerdevelopment.usta.com/content/fullstory.sps?iNewsid=114689&itype=7418
How to Play Tennis
http://www.expert-tennis-tips.com/tennis-strokes.html
http://www.life123.com/sports/golf-tennis/tennis/the-rules-of-tennis.shtml