Dave Whelan, chairman of Wigan, who won the FA Cup semi-final against Millwall 2-0, said he could not understand Millwall fans fighting each other.
I can't understand why the Millwall fans would fight each other.
I understand if they want to fall out with the visiting team, but why would they fall out amongst themselves? It just gives football a very, very poor reputation.
We know Millwall are a tough club, their team's tough to play, the supporters are Millwall Millwall Millwall ... straight through. But don't fight each other. I couldn't understand that.
The Wigan chairman was speaking to BBC Radio 5 Live.
More top news
A boy was left hanging precariously out of a car after it crashed on a bridge
During a nine month investigation by ITV News, we learned of Kotey’s role influencing extremists in west London.
A Metropolitan Police investigation into an allegation of sex abuse against Lord Brittan was "fully justified", a review has found.