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Tennis is one of the most popular sports throughout the world, with approximately 75 million participants worldwide. It is a sport that you can play at every age and at every level. Children can start playing from the age of 4, using softer/slower balls and smaller rackets on modified courts (tennis10s, mini-tennis, tenniskids and so on) to make the game easier and more fun, gradually progressing after age 10 to regular rackets, balls and courts. Seniors can come to the sport at any age and can play all their life, with international …