Joe's Tennis String Forum - Experiences with tennis strings and racquet stringing. Includes ratings of different brands, tips on stringing, and a price table for racquet stringing mail-order services in the USA.
International Tennis Hall of Fame - Museum based in the US, featuring 13,000 square feet of exhibits.
New Women's Tennis - Statistics and events listings for the women's tour, including past and upcoming tournament locations and prizemoney; and singles and doubles rankings.
Racquety Yak - A forum for fans, with multiple ways to contribute, including message boards, chat, and user submissions.
Tennis Forum Frigate - Discussion forum and live chat devoted to tennis.