Designed for upmost demanding performance during competitive tournaments, the Dunlop ATP Official tennis balls provide incredible feel and proper consistency to match the high standards of competitive plays. It’s the official ball used at the season-ending ATP NextGen Finals and Nitto ATP finals. When hit with a racket it provides a magnificent shot sensation, and with the HD Pro Core and HD Pro Cloth, the ball offers spectacular playability and increased visibility. The balls arrive conveniently in a handy tube of four.