Slazenger TB Wimbledon Tennis Balls - tube with 4 balls Slazenger tennis balls have been used on the sacred grass courts of the All England Club since 1902, and with the latest Wimbledon ball, Slazenger has created the world's ultimate performance tennis ball. Sold in a can of 4 balls. Tour Core™ is engineered to deliver the consistent performance characteristics required by the world's most prestigious tournament. The premium woven cloth is specially designed for championship play, using the finest wool to achieve a tighter weave, providing increased durability and responsiveness. The Wimbledon ball uses an exclusive Ultra Vis dye and patented application process, creating a ball that has optimal visibility for both players and spectators. By using Slazenger's patented Hydroguard™ technology, we have created a cloth that repels up to 70% more water than a standard ball. This further innovation ensures that the Slazenger Wimbledon Ball remains the ultimate performance tennis ball.