The product is a Wilson US Open tennis ball signed by Roger Federer. This authentic autographed item comes with a Sports Memorabilia Certificate of Authenticity (SM COA) to verify its authenticity. As a collectible piece for tennis fans, this signed tennis ball holds value as a unique and special keepsake from one of the greatest players in the sport's history. Perfect for display or as a valuable addition to a sports memorabilia collection, this item is a must-have for any Roger Federer fan or collector of tennis memorabilia.