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
The Government is to choose which scheme to back after a review of the UK's airport capacity. Here are the three shortlisted options.
The government's long-awaited decision on which scheme - Heathrow or Gatwick - should get the go-ahead will finally be announced later.
Up to six militants attacked the centre in the Baluchistan province opening fire and detonating explosive vests.