Adidas 2020 UEFA Champions League Official istanbul Match Ball authentic100% . OFFICIAL GAME BALLA BALL OF ENERGY FOR EUROPE'S TOP CLUB COMPETITION. Stars collide as the UEFA Champions League heats up. The vibrant, colorful design of the competition's official game ball is inspired by the venue in Istanbul . Seamless and thermally bonded for increased accuracy, a true touch and low water uptake, it has a textured surface that further optimizes performance. A FIFA stamp and red valve confirm its quality.