What are tennis balls made of? Modern tennis balls are made of a hollow rubber core, covered in a wool or nylon shell which is known as the nap. Pressurised air inside the rubber core makes the ball ...

The balls were obviously not created with canines in mind. But that hasn’t stopped them from becoming beloved dog toys. You’ve probably seen a dog bounding after a tennis ball at one point or ...

Opponents hit a tennis ball with a racket back and forth over a .914 metre (3ft) net in the middle of the court. The goal is to hit the ball into the opponent’s half of the court without them being ...