Did you know that the first tennis ball was made in the 15th century from stuffed leather and wool? Yes, it happened and in the course of time, the manufacturing process and materials get replaced by air-filled rubber balls. Also you'll be surprised to know that around 300 million tennis balls are manufactured each year and there are more than 200 tennis ball brands have been approved by the ITF for tournament use. Watch the video here to know more interesting facts about the tennis balls.
https://vimeo.com/185634129
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