Junior Tennis

Includes information on USTA national and ITF tournaments, rankings, coaching, player profiles, and interviews.
http://www.juniortennis.com/

Canadian Tennis Association

News and information on Canadian tennis and players, the Tennis Masters Series - Canada men's championships and the duMaurier Open women's championships.
http://www.tenniscanada.com/

CBS.SportsLine.com: Tennis

Includes information on the ATP and WTA tours, results, schedules, rankings.
http://ps1.sportsline.com/u/tennis/index.html

National Capital Tennis Association

Contains a club directory and information about membership, tournaments and leagues.
http://www.ottawatennis.com/

ATP Tennis

Official site for the organization overseeing the professional men's tour.
http://www.atptennis.com/