Because of this, chemicals are less likely to enter the skin. Leather, on the other hand, is set to keep the players' feet dry on environments that are off court. The third material that can be used is vinyl. This tops in keeping the feet dry. But beware, what's set to keep the feet dry can make it 'wet' during seasons of hot weather (hello smelly feet! Dior's sense of fashion inspired the man so he made tennis skirts look more feminine by adding more flair to them. Very soon, aside from the femininity of the tennis skirts, comfort was also prioritized. And since tennis is sports, the outfit that goes with it should serve its purpose. Modern-day tennis skirts have gone a long way from its predecessors. The Different Milestones in the History of Tennis Although popularly known to have originated from Europe, the origins of tennis can be traced back in ancient Egypt around 1500BC. The earliest evidences are the drawings discovered on the walls of Egyptian temples built more than 3000 years ago. This proves that the Egyptians were the first to have actually played this ball game as part of their religious traditions. This is the kind used in major tournaments and has to be disposed off afterwards because it will no longer bounce that well after less than a month in use. The second type, which is not pressurized, has a solid core. It lasts longer which is good for those who practice in the courts regularly but has to be replaced due to wear and tear. When you sign the Anti-Doping Consent, it just means that you are willing to undergo drug testing in compliance with the tenets of the World Anti-Doping Code. For first-time applicants, you are required to furnish a copy of either your birth certificate or passport, as proof of identification. If you are below 18 years old, you can still join the WTA Tour. ITN 1 corresponds to high-level player (holding an ATP / WTA standing or of a comparable playing standard). The ITN 10 is a player who is capable of serving and returning an ordinary ITF ball in a full court. ITF uses the Description of Standards and On Court Assessment to rate the players if there are no available results from competition.