““According to the principles Johan Cruyff introduced to Barcelona, coaches should lead by example: play football, be on the field during training and teach, because there is nothing better than stopping the game, correcting and instructing, explaining why someone needed to pass to a certain player, move to a particular position or change an element of their technique. That’s how Carles Rexach, Cruyff ’s assistant for eight years at Barcelona, explains it: ‘One word from Johan during a training drill is worth more than a hundred hours of talks at the blackboard.””