Every September the toughest tournament in the world uses over 70,000 of the toughest tennis balls: Wilson U.S. Open balls. For 40 years, Wilson has been the only ball that has held the distinction of being the "Official Ball of the U.S. Open".

Constructed of premium high-grade wool that is woven into a thicker, denser felt, the Wilson U.S. Open tennis ball is known for its superior playability, consistency and durability.