The official ball of the ATP tour, the new ATP ball is the peak of consistency and performance. Used at more tournaments than any other brand, the Dunlop ATP is the number one ball on tour. HD Pro Core and HD Pro Cloth combine Dunlop's best tennis ball technologies to create a long lasting and conistent bounce. If you played with the Dunlop Fort ball in the past you'll find this to be similar in performance. Used at this year's ATP NextGen and Nitto ATP Finals, this ball is the top choice for players and tournaments around the world.