Cristiano Ronaldo Signed Autographed Manchester United Adidas Logo Soccer Ball (Fanatics Certified). You are looking at a Signed/Autographed Cristiano Ronaldo Adidas Soccer Ball. This autographed Adidas soccer ball has been personally hand-signed by soccer superstar, Cristiano Ronaldo. This autograph is certified by Fanatics. LONE STAR SPORTS MEMORABILIA. We do appreciate your coming by our listing. We have many more items for sale, and we’re updating our store on a consistent basis. We pride ourselves on bringing you such signed/autographed items as. We will respond to you within 24 hours and do our best to help you out!