The attack on Tottenham supporters happened at Rome's Drunken Ship pub.
Bar co-owner Gabriele Cianella said the attackers had thrown pieces of iron at the windows and were wearing knuckle dusters.
I think this is the first time that something so bad has happened. We have had other incidents like this but this is the worst.
If you throw stones and knuckle dusters I think you want to hurt someone. There was a lot of blood inside on the floor.
Now we also have some blood on the windows. They came here to hurt someone.
More top news
Planning on going to the London Marathon tomorrow? Read our handy guide first!
Celebrations to mark St George's Day have started in Trafalgar Square with feasts and tea to be found in abundance.
People took to the streets of Brixton today to march against what they see as the 'gentrification' of the area.