ITF is the abbreviation of League of Nations. \x0d\ The task of the International Tennis Association is to formulate, revise and implement tennis rules, promote the development of tennis at all levels in the world, safeguard the interests of tennis internationally, promote and encourage tennis teaching, formulate and implement international competition rules, decide official tennis matches recognized by the International Tennis Association, improve the influence of the members of the Association, safeguard the independence of the Association, determine the qualifications of athletes, manage amateur, professional and amateur mixed competitions, and rationally use the funds of the Association. \ x0d \ x0d \ and what we usually call ATP and WTA are more focused on the global operation of tennis business. It is also responsible for coordinating the partnership between professional athletes and competitions, organizing and managing the points, ranking and bonus distribution of professional athletes, and formulating competition rules and granting or canceling players' qualifications. \ x0d \ x0d \ Four Grand Slams, Davis Cup and Confederations Cup, including the Olympic Games, which we often hear about, are official events of ITF. \ x0d \ x0d \ ITF has the following organizations: Olympic Committee, Youth Competition Committee, Senior Athletes Committee, Technical Committee, Tennis Rules Committee, International Network Rules Committee, Finance Committee, Medical Committee, Mass Media Committee and Coach Committee.