HEAD TOUR XT TENNIS BALL DESCRIPTION The TOUR XT is HEAD's brand new PREMIUM ball. The HEAD TOUR XT has been developed and rigorously tested for more than two years? in the laboratory and on the court with professional tennis players. The result is a ball that offers a unique touch and easy controllability thanks to its Impact (EN)Core technology. Choose the iconic HEAD TOUR XT gold tube, if you are a tournament or club player? or anyone else looking for the perfect ball to hit your best, most accurate shots.