Huge inventory of authentic autographed sports and entertainment memorabilia and collectibles. Cristiano Ronaldo Signed Manchester United Adidas MAN U Jersey Fanatics 165168. Offered is a Cristiano Ronaldo Signed/Autographed Manchester United Red Adidas Soccer Jersey. This jersey is authenticated by Fanatics Authentic and includes their Tamper-proof Hologram Sticker and Certificate of Authenticity.We welcome any questions, concerns, or queries you may have. Best Authentics is a leading sports memorabilia and collectibles retailer located in South Central Pennsylvania. We have specialized in supplying quality authentic products to collectors for over 20 years and continue to update our inventory frequently with new and exciting items.