LONG BALL Step up to the baseline as you would to serve, but with a tennis ball in your racquet hand. Throw the ball over the net to the proper box. Good height over the net plus a long throw ...

In many ball sports like golf, football and tennis, controlling the ball’s spin is an important skill. Expert players can make golf balls curve around obstacles, launch footballs towards goal ...

But, of course, serving the ball inbounds is just the first step ... per hour faster than the average female professional tennis player. Now, part of that speed is the result of pure strength.

In many ball sports like golf, football and tennis, controlling the ball’s spin is an important skill. Expert players can make golf balls curve around obstacles, launch footballs towards goal ...

For tennis ball machines to shoot balls with perfect accuracy and at nearly 100 miles per hour, it takes a series of carefully calibrated parts working together. Here's what it looks like inside.