Men's Tennis Statistics. Futures, Satellites, etc. Brilliant info site.
E-mail updates, junior rankings, pics, news, etc.
Tournament info, find a coach, junior, open & Veteran info.
The Australian Tennis Magazine.
International Tennis Federation. This is a great site, rankings, pics, news, 10/10
Another good site covering the ATP Tour.
Women's tour information. Pics, news, rankings, 10/10
Official NEC Davis Cup site.
The Australian Open site. (one of the major tournaments) History, pics, news, etc.
The French Open site. (one of the major tournaments) History, pics, news, etc.
The US Open site. (one of the major tournaments) History, pics, news, etc.
The Wimbledon site. (one of the major tournaments) History, pics, news, etc.
The International Tennis Hall Of Fame: Read up on all the past greats of the game.
Retail site of tennis equipment. racquets, strings, shoes, etc. (big range of products)