listing:

• Tennis Corner
  tournament results, rankings and misc info.
• Tennis Server
  info center hosting original commentary, advice, tennis news, a newsletter, and online community resources.
• TennisONE
  comprehensive tennis site covering the entire United States. Instructional columns, regional listings for clubs, tournaments, stores, school and resorts.
• Women of Tennis
  including photo galleries, bios, and stats on the major names in women's tennis.
• World Wide Tennis Ladder
  free service for tennis players of all levels which helps players find opponents and maintains worldwide, local and personal stats.