Is kick serve wrong in tennis?

Answer 1

A kick serve becomes less effective when the returner can predict when it is coming. Because of the greater spin, a kick serve travels less slowly. If the returner can position himself to strike the ball before the kick takes effect, he can punish the return severely. Many servers use the kick serve as their second serve; however, they must still occasionally throw in a slice second serve to prevent returners from getting grooved on their returns.