Newcastle United manager John Carver allegedly offered to fight a fan during today's defeat to Swansea City.
The home side slumped to their seventh loss in a row as they succumbed 3-2 to the Welsh side, and Carver allegedly used foul language to address a supporter who questioned him during the game.
Allen Ocon, who is said to be the victim, wrote on Twitter that Carver: "Told me to meet him outside after the game and a lot more when I asked why there was no passion, [he] always swore at me."
He earlier posted: "Asked Carver why players won't pass to [Adam] Armstrong and he said "I don't know what do you want me to do get out there yourself and do it".
Carver also clashed with supporters earlier in the season as he confronted protesters before their 4-0 defeat to Southampton.
Neither Newcastle or Carver are yet to make a statement on the allegations.