Eduardo Luján Manera, was an Argentine football defender, and a manager who won the Argentine Primera with Estudiantes de La Plata as player and manager, and was banned from football for 20 games by the Argentine Football Association and sent to prison for a month following assaults on AC Milan players during which event, was a two-legged football match contested between 1968–69 European Cup champions Milan and 1969 Copa Libertadores winners Estudiantes?