Dunlop Grand Prix Extra Duty (Multiple)

The Dunlop Grand Prix Extra Duty is the 'heavyweight' of the 2026 Dunlop collection, a ball that has earned its reputation through sheer toughness. Originally developed to meet the demands of high-level collegiate and tournament play, the Grand Prix is built around a 'premium woven felt' that is significantly more durable than the needle-felt used in standard championship balls. This 'Extra Duty' version is specifically tailored for hard courts, featuring a felt weave that is reinforced with synthetic fibers to prevent 'shredding' on abrasive surfaces. Internally, the Grand Prix features a specialized core formula that provides a slightly 'heavier' feel. This weight is not literal—the ball stays within ITF mass limits—but is a result of the core's compression settings, which give the player a sense of 'penetration' through the court. This makes the Grand Prix the preferred choice for powerful baseliners who want a ball that won't get pushed around by the wind or lose its pace after a few heavy rallies. In 2026, the Grand Prix remains the official ball of countless regional tournaments and high-school leagues because of its 'honest' performance; it doesn't offer gimmicks, just a high-quality, long-lasting hit. It is also noted for its excellent pressure retention; a can of Grand Prix balls can often be used for a second or even third practice session without feeling completely 'flat.' While it may feel slightly 'stiff' to players used to the softer Dunlop Fort, its stability and durability on outdoor courts are unmatched in its price bracket. For the competitive player who wants a ball that can stand up to 100mph serves and heavy topspin for multiple sets, the Grand Prix Extra Duty is the industry standard.