International Tennis Numbers

A guide to comparisons between national tennis ratings, regional rankings, and professional rankings.
http://www.internationaltennisnumbers.com

AceManTennis.com

Statistics and events listings for the women's tour, including past and upcoming tournament locations and prizemoney; and singles and doubles rankings.
http://www.efekt.com.au/cgi-bin/draw.exe

International Tennis Hall of Fame

Museum based in the US, featuring 13,000 square feet of exhibits.
http://www.tennisfame.com/

Driftway Collection - Tennis at the Turn

A gallery of tennis memorabilia from the turn of the 20th century, outlining the sport's evolution from a backyard recreation to a world sport.
http://www.driftwaycollection.com/