A PSG fan was stabbed and rushed to hospital on Monday when a group of over 50 Milan ultras attacked French supporters in the Navigli neighbourhood.
Il Corriere della Sera and La Gazzetta dello Sport claim the PSG fan is in critical condition after being stabbed by Milan ultras on Monday night.
Both sources claim more than 50 Milan ultras arrived in the area of Navigli with helmets and smoke bombs to launch a deliberate attack on PSG ultras and ordinary fans at bars and nightclubs in one of the most lively areas of the city.
The PSG fan was stabbed twice in the leg and was taken to hospital in critical condition.
PSG ultras clashed with the Police as well. One agent was stabbed and a French supporter was arrested. An object thrown by PSG fans wounded another agent.
Milan and PSG will meet at San Siro tonight in a key Champions League match at San Siro with kick-off at 20:00 GMT.