Merseyside Police have confirmed two Liverpool fans have been assaulted in Naples.
The Reds are in Italy ahead of their Champions League clash with Napoli.
Jurgen Klopp's side begin their title defence as they look to retain their Champions League crown.
Two Liverpool fans suffered 'cuts and grazes' to the head as they were assaulted at a city centre bar.
A statement from Merseyside Police read: "We can confirm two Liverpool fans were reported to have been assaulted in Naples earlier today.
"At around 6pm local time (5pm GMT), it was reported a number of males on scooters approached the fans at a bar in the city before assaulting them.
"Two men from the UK, aged 26 and 46, sustained superficial cuts and grazes to the head and were treated at the scene before continuing to attend the match.
"Local police are aware and Merseyside Police are working with police colleagues in Naples to assist in the policing of the Champions League fixture."
A witness told the Liverpool Echo: "We were just trying to have a quiet drink before going to the apartment and had just paid our bar bill.
"Next minute we could see about 10 scooters flying down. They slowed right down and their faces were covered with scarves and helmets.
"Next second they are jumping off swinging belts towards us. Must have all happened in 90 seconds but some lad got hit by a belt."
Jurgen Klopp made three changes to his Liverpool line-up for the clash with Jordan Henderson, James Milner and Roberto Firmino all returning.
On his line-up, the Liverpool boss said: "We need to be intense tonight and for that we need some fresh legs.
“We have that now in two positions in a very decisive area of the pitch. That’s clear. That was the plan for the line-up.”
Napoli XI: Meret; Di Lorenzo, Manolas, Koulibaly, Mario Rui; Callejón, Allan, Fabián Ruiz, Insigne; Mertens, Lozano.
Liverpool XI: Adrian;Alexander-Arnold, Matip, Van Dijk, Robertson; Milner, Fabinho, Henderson; Salah, Firmino, Mane
