In order to keep lateral momentum as a source of power, the player needs to keep the inertia (lateral direction) without pulling the breaks before the stroke transferring the linear momentum into the forward momentum

In order to keep lateral momentum as a source of power, the player needs to keep the inertia (lateral direction) without pulling the breaks before the stroke transferring the linear momentum into the forward momentum
In tennis, the player transfers the energy from the body to the ball through a tennis racket to generate speed and spin of the ball. The loaded energy is the potential (stored energy) is transferred through the kinetic chain into the moving energy (the energy of movement) of the body segments in the timely manner through the ball into the wanted direction