US Open 4 Ball Yellow

Wilson US OPEN XD 4 Ball is a hybrid ball with the durability of a 4-piece ball and the feel of a 3-piece ball. Wilson's US OPEN XD tennis balls feature four layers of foam to provide more durability and firmer feel when in play. Officially licensed by the USTA, these yellow tennis balls are perfect for any player who wants a consistent, hard wearing, and high performance ball.