Police say an altercation occurred between a group of men and two sustained cuts and bruising to their face.
Four people have been arrested after an altercation outside Watford FC’s stadium that left two men in need of hospital treatment.
The men sustained cuts and bruises to their faces, said Hertfordshire Constabulary.
Police were called to Vicarage Road just after 5pm on Saturday at the end of Watford’s Premier League match against Everton, which they won 1-0.
Watford supporter Lewis, 31, who did not want to give his full name, said he “heard a lot of shouting” as he was leaving the stadium after the match and “went to take a look”.
He said he saw “a Watford fan lying on the floor, apparently unconscious, with blood on his face” and “three Everton fans running from the scene towards the town centre”.
He added: “Friends around him were crying and shouting for people to help and call an ambulance.”
A police spokeswoman said: “At around 5.10pm, an altercation occurred between a group of men.
“Two sustained cuts and bruising to their faces and have been taken to hospital for further assessment.”
Everton supporters were involved in ugly scenes before and after an FA Cup game against Millwall in London last month.
Fans were seen on video posted on social media trading punches and specially trained police were deployed to the Den, in Bermondsey, to help the 200 officers on duty for the match as violence escalated.