The head graphene xt radical s tennis racket endorsed by andy murray offers top quality performance thanks to the head light balanced frame that increases manoeuvrability and provides excellent durability and strength while being light graphene xt technology optimises the weight balance and combined with the large head size of 102in2 660cm2 increases your access to power the racket is strung with the hawk touch 17 string that is firm and gives you more control but offers good shock absorbenc