Go for gold with these sporty action shots! Here's how to achieve mesmerizing water spinning from tennis balls mid-air ...

Slinger Bag ball machine. I hadn’t played tennis against a machine since the 1980s, so I was surprised when balls shot out of the Slinger with powerful topspin — more than almost anyone I play ...

You're already trying to focus on 1) where the opponent is, 2) where to hit the ball, 3) how to hit the ball, 4) where to recover. Not to mention doing it all over again, this time with the body ...