Conor McGregor was allegedly involved in a bar brawl in Dublin on Saturday.
A man has told police the UFC superstar punched him after a verbal exchange in Drimnagh.
Gardai have confirmed they are investigating an alleged assault at the Marble Arch pub, reports the Irish Mirror.
One source said the man believed McGregor was being a 'show off' and "went up to have a word with him".
Another source said that before the alleged punch-up, someone approached McGregor, saying: “The Russian battered you" - in reference to his defeat to Khabib Nurmagomedov.
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One punter spoke out about the incident inside the bar to the Irish Mirror.
He said: “There was a bit of a commotion, he [McGregor] was acting the mick and there was an incident.
“The man that was allegedly assaulted is from Ballyfermot and drinks in the pub a good bit.”
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McGregor had attended an amateur fight at the Green Isle Hotel in Clondalkin, Dublin, on Friday night.
The hotel posted on their Facebook page that they were “delighted to welcome Conor McGregor ”.
In a statement to the Irish Mirror last night, a Garda spokesperson said: “Gardaí are investigating an incident at a pub in Drimnagh, Dublin on April 6, 2019.
“No arrests have been made. Investigations are ongoing.”
McGregor faces court in Miami this week for allegedly stamping on the phone of a Britisih fan, although he does not have to appear in person at that hearing.
McGregor recently completed community service for attacking a bus crammed with MMA fighters in Brooklyn, New York, last April.
The Irish Mirror contacted representatives for Conor McGregor for comment.
