The thinner tennis line can eat the ball deeper, so it means that it can add more rotation and control to the ball. However, the result is that the line is not durable, so it is more suitable for the players in front of the net who use their strength to hit the ball; The thicker tennis line is more durable, so it is more suitable for bottom-line players who often take the initiative to use. When selecting the tennis line, you can select the thicker or thinner tennis line according to your own playing method.

Polyester string polyester is another durable ball string material, which is wrapped with a layer of polyethylene material outside many nylon strings to make them integrated. Nowadays, more and more professional players have used the strings made of this material. However, the polyethylene material itself loses its elasticity faster than other artificial strings, so it is often used by leisure players mixed with Kevela strings.