0905 GMT July 22, 2018
Reports of violence outside Anfield emerged just before kickoff of the first leg which Liverpool went on to win 5-2, FourFourTwo reported.
Merseyside Police initially confirmed they were investigating the "serious assault" of a man outside The Albert pub on Walton Breck Road near the stadium, with the victim a 53-year-old who suffered serious head injuries.
Police later announced two arrests had been made on suspicion of attempted murder, with two men from Rome, aged 25 and 26, taken into custody.
The Liverpool fan remains in a critical condition on Wednesday and Roma have released a statement, speaking of the ignominy that has been brought upon their club.