The X-One ball is a pressure competition ball. The X-One is a lively, fast, high-performance ball with good longevity. It is equipped with X D-Core technology. X D-Core from Tecnifibre is a revolutionary technology that reduces the deformation of the ball during play by 20%. This innovation allows the core to retain its initial shape over a longer period of play. the same dynamic signature and therefore the same sensations. Play longer with the same gameplay. The choice of competitors. Used at the ATP tournaments in Marseille and Rotterdam, this ball is intended for good level players.