A Celtic fan from Londonderry was blinded in one eye after attending the Old Firm derby in Glasgow on Sunday.
The Irish News has reported that 48-year-old Charlie Phelan was the victim of an unprovoked attack in Girvan following Celtic's 1-0 win over rivals Rangers.
Mr Phelan suffered a number of injuries including a broken eye socket, cheekbone and nose in the attack which left him unconscious.
He told the Irish News that his attacker was wearing "union jack shorts" and he believe he was targeted because he was wearing a Celtic jersey and scarf.
Mr Phelan had traveled to Glasgow for the game at Celtic Park with a group of other Celtic fans who regularly attend games.
“I had just come out of a fish and chip shop when I was hit. I don’t really remember a lot but I’m told I was hit twice and knocked out,” Mr Phelan told the Irish News.
“I have to have reconstructive surgery to my cheekbone and I’ve suffered fractures to my fingers and wrist as well. They could have killed me. I had no chance to defend myself.
“They think he might have had a knuckleduster because the doctor said he must have had something hard in his hand for the damage he caused.
“My face is a mess and it’s sore. The anger hasn’t even sunk in yet. I will not be back.
“I’ve been going over to Celtic games for 25 years and nothing like this has ever happened.”
Scottish police have confirmed they are investigating the attack but said they are not treating the attack as "sectarian or football related".