United States Tennis Association (USTA) http://www.usta.com
Lawn Tennis Association (UK) http://www.lta.org.uk
International Tennis Hall of Fame http://www.tennisfame.org
Frence Tennis Federation http://www.fft.fr
Canadian Tennis Association http://www.tenniscanada.com
Tennis Australia http://www.tennisaustralia.com.au
Asian Tennis Federation (ATF) http://www.asiantennis.com
American Tennis Association http://www.afn.org/%7Eata/
The New England Health, Racquet & Sportsclub Association http://www.nehrsa.org/Club/Scripts/Home/home.asp
Spanish Federation http://www.rfet.es/
Argentina Tennis Federation http://www.tenisargentina.com/
Brazilian Tennis Confederation http://www.cbtenis.com.br/
Netherlands Tennis Association http://www.knltb.nl/