AS Roma players trained ahead of their Champions League semi-final second leg wearing shirts bearing the words "Forza Sean" in support of injured Liverpool fan Sean Cox.
The 53-year-old from Dunboyne in Co Meath was attacked outside Anfield before Liverpool's 5-2 first-leg win last week.
He remains in a serious condition in hospital in the city. Two Italian men have been charged over the attack.
Liverpool manager Jurgen Klopp said the t-shirts were "a great, great, great gesture".
"I already thought Roma showed a great gesture when training at Anfield and placing flowers at the memorial for the 96," he said, referring to the victims of the 1989 Hillsborough stadium disaster.
"These two teams deserve to be here because of football, because they show the maximum respect for the other side."
The Liverpool boss said he hoped tomorrow night’s match would take place in the right atmosphere.
"It's good that we spoke about it, showed Sean's family our support but I really hope that everybody understood that tomorrow in this beautiful city, with good weather, that everyone can walk to the stadium and look forward to an intense, fantastic and very important football game.
"I really hope that will be possible."
Roma coach Eusebio Di Francesco said earlier that he was "shoulder-to-shoulder with Sean Cox and his family".
Three thousand police officers have been deployed in the Italian capital to avoid a repeat of the ugly scenes seen on Merseyside, with around 5,000 Liverpool supporters expected to travel to the city.
The game is live on RTÉ Two tomorrow night, with kick-off at 7.45pm.
