Sidespin or topspin terminology

 Hello Alois, hello Jeff

If a ball comes to me in a quite almost straight path but then after impact kicks off strongly to the side, do you call it sidespin or topspin? How do you call it?

The ball coming circles sideways but the path of the spin is north south. for me as observer its a quite straight path coming at me, the ball doesn't make a strong curve in the air cause there is no spin around the equator.

thanks

Hi Marcin,

This is still a sidespin serve.  The speed of the ball initially makes it go in a straight line.  Once the speed decreases, the sidespin effect comes into play and the ball kicks to the side.