Social
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- International Tennis Number On Court Assessment
- A system for players to track and chart their own development and improvement as well as compare their score to other players from around the world.
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- TennisEngine.com
- Computerized tennis ladder system that offers three ranking methods: quality based for closed leagues, casual 20 point league system, and a traditional tiered ladder.
- 5
- The Tennis Information System
- Extensive collection of statistics and data relating to various amateur tournaments, rankings, and ratings.
- 6
- Word Team Tennis Recreation Program
- A recreational league founded by Billie Jean King in 1974. Provides signup information, news, and rules.
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