Get introduced to the perfect training ball from Dunlop. Featuring the same weight and rebound of a standard tennis ball, the Speedball's larger size (about the size of a softball) slows the speed of flight, helping player's learn the proper stroke mechanics.Why is it called ...Get introduced to the perfect training ball from Dunlop. Featuring the same weight and rebound of a standard tennis ball, the Speedball's larger size (about the size of a softball) slows the speed of flight, helping player's learn the proper stroke mechanics.Why is it called Speedball? It increases the speed by which players can learn proper tennis strokes.
It helps players hit with a full swing, increasing racquet head speed. Speedball is the Official Teaching/Training Ball of the PTR.12 Balls Per Package.