Dear All, this year RoboCup organizers plan to purchase the recent FIFA World Cup ball (e.g. https://www.adidas.co.uk/fifa-world-cup-mini-ball/CE8139.html <https://www.adidas.co.uk/fifa-world-cup-mini-ball/CE8139.html> for size 1) as competition ball for the Humanoid League. Regards Reinhard (for the TC and OC)