The ATP Tennis auction for charity was held at the Stadium of Qi Zhong and also featured banners and t-shirts autographed by various ATP Tennis stars. Roger Federer s shirt fetched the highest bid that amounts to twenty eight thousand RMB. A close second were two bobby Mercedes-Benz cars autographed by all ATP Tennis players that are in the eight man elite team field, the total of which fetched to twenty five thousand RMB. What You Should Know About Your Tennis Racquet The general rule for tennis racquets is that the stiffer the frame, the more power it generates. This is because: - the heavier the frame, the more power it generates - the heavier the frame, the less it vibrates - the stiffer the frame, the more power it generates - if the frame is stiff, then it transmits more to the arm - a stiff frame entails a more uniform ball response against the swing of the racquet - the larger the frame, the more power it generates - the larger the frame, the more resistant it is to twisting 4. Athlete Assistance The Athlete Assistance is an answer to the player's need for more education and tips in handling their professional career. The Sony Ericsson WTA Tour regularly provides education topics, available on its website, that are focused on improving the player's performance on the court and answering other problems they may encounter as a professional tennis player. You must know that the surfaces of your feet have different needs, and your feet are unique like the creases and prints on your palm requiring something that is also uniquely suited for you. Although you may be easily be swayed by the attractive style and color of the shoes, you must first consider whether those shoes are compatible to your foot type. Clay Courts Flattened shale, brick or stone, are the materials used for clay courts. They can either be green or red in color. American or green or clay is faster, than the red ones. Courts made from clay are being regarded as "slow", since ball bounces rather high and much more slow, This makes it more hard for the athlete to strike an overrun ball. Twelve national associations established the International Lawn Tennis Federation (ILTF) in Paris, France on 1 March 1913. In 1924 it turn out to be the officially accredited organization with authority to be in-charge of lawn tennis all over the world. In 1977 it removed 'lawn' from its name, as it recognized that majority of tennis games are not played on grass courts.