[jeneticallymodified]

the only tennis i ever play is on super monkey ball deluxe for the playstation, but if it helps, i found these links that appear to be a wealth of information on the subject:

the two below are very descriptive but have lots to take in:

http://en.wikipedia.org/wiki/Tennis

http://en.wikipedia.org/wiki/Tennis_score

this page has links to other pages, including one with photos showing you how to make posh shots, too:

http://tennis.about.com/cs/beginners...innerscore.htm

links to the right of this page offer more basic info:

http://news.bbc.co.uk/sport2/hi/tenn...nt/4222290.stm

and holy mackerel: the internation tennis federation has a 41 page rule book:

http://www.itftennis.com/shared/medi...8_original.PDF

hope this helps a smidge.... don't know if it will or not.