Strings (tennis)
The material used in tennis string can significantly affect a player's performance, and even health. Several materials are used to make tennis strings. They vary in terms of elasticity, durability, rebound efficiency, tension holding capability, and manufacturing cost, among other considerations.
Follis (ball)
In his testimony, Joan Lluís Vives explains the Jeu de Paume comparing the strings of the racquet from that game, played in Paris with drones gut of the sixth string of a guitar. the demands of a tennis racket stringing regard to the determine the strings of animal intestine are well suited for this use.