Falkirk boss John McGlynn says the fan disorder at last week's Old Firm match has set Scottish football back "30 or 40 years".
Celtic fans initially spilled on to the pitch in celebration after a 4-2 win on penalties in the Scottish Cup quarter-final at Ibrox before some Rangers supporters charged towards them.
Flares were thrown as police and stewards formed a barricade to separate the two groups of supporters. Nine people have been arrested in connection with the violent scenes that resulted in injuries to police officers, stewards and members of the public.
McGlynn says he feels it's a sad moment for the Scottish game when there has been so much to enjoy about this season.
"It doesn't paint a very nice picture," he said.
"It's a beautiful game, it's so cold, but there's nothing much beautiful about it.
"The game itself wasn't a great game of football and what happened afterwards, and by all accounts maybe what happened before, and all the rest of it, it's really taken us back maybe 30 or 40 years to Hampden and police horses on pitches and all that type of thing.
"It's sad. I'm football, I bleed football as you know, and it's not nice."
McGlynn hopes when Falkirk meet Dunfermline in the Scottish Cup semi-final at Hampden in a few weeks there are no incidents between fans who have clashed in the past.
"I'm obviously concerned because there's bad blood between Falkirk and Dunfermline," he said.
"I'm just hoping that our game goes along and the football does the talking and there's no nonsense."
