Tournament Software

http://www.tournamentsoftware.com

Munster Tennis

http://munstertennis.com/

Tennis Ireland

http://www.tennisireland.ie/
http://www.tennisireland.ie/calendar/tournaments/senior_calendar
http://www.tennisireland.ie/calendar/tournaments/junior_calendar
http://www.tennisireland.ie/clubs/child_protection
http://www.tennisireland.ie/links
http://www.tennisireland.ie/player_database
http://www.tennisireland.ie/clubs/find_a_club
http://www.cardiotennis.com/

ITF

http://www.tenniseurope.org/
http://en.coaching.itftennis.com/home.aspx
http://www.tennisicoach.com/
http://www.itftennis.com/seniors/home.aspx
http://www.itftennis.com/juniors/home.aspx

Rules of Tennis

http://www.itftennis.com/technical/publications/rules/overview.aspx

ATP

http://www.atpworldtour.com/
http://www.daviscup.com/en/home.aspx
http://www.wimbledon.com/index.html
http://www.rolandgarros.com/en_FR/index.html
http://www.usopen.org/index.html
http://www.atpworldtour.com/Tennis/Tournaments/London-Finals.aspx