“People often talk about how racquet technology has changed tennis ... on balls fired from a ball machine at about 51 mph, the study concluded that “outgoing spin” from the selected group ...

But in terms of never missing a shot, getting tired or smirking at a flubbed volley, you can’t beat the dependability of a ball machine. The Slinger Bag puts an innovative spin on this familiar ...

Tennis ball machines are designed to simulate the experience of playing against an opponent. Using motors and adjustable feeders, they launch balls at varying speeds, angles and spin types to ...