Sean Cox, a father of three from Ireland, has been in an induced coma after sustaining head injuries before last Tuesday's Champions League semi-final between Liverpool and Roma.
The 53-year-old was ambushed outside The Albert pub next to Liverpool's stadium just a short while before kick-off.
Two Italian men have been charged over the incident, and neither opted to enter a plea on Thursday when they appeared before magistrates.
Filippo Lombardi, 20, has been charged with violent disorder and wounding/inflicting grievous bodily harm and Daniele Sciusco, 29, is charged with violent disorder.
Liverpool have been striving to ensure fan safety as the two sides meet again in the return leg in the Italian capital by liaising with authorities to ensure a significant police presence.
Several footballing authorities and bodies have condemned the violence, and both Liverpool and Roma spoke out to denounce fans who acted in such a way.