Birmingham City boss Alex McLeish is demanding fans behave themselves during the derby against Wolves.
St Andrew's was turned into a war zone after Blues Carling Cup quarter-final win over bitter rivals Aston Villa when a pitch invasion turned into a full-blown riot between opposing fans.
Police are still investigating the trouble and City boss McLeish described the scenes, which included flares and missiles being thrown, as a return to 'the dark ages'.
And the Scot insists a repeat will not be tolerated at Molineux in Brum's first derby since their Second City shame.
He said: "The supporters are under pressure. Just as we're under pressure to get results and behave ourselves on the pitch, they've got to do likewise.
"We expect our fans to give the players everything but also to make it a trouble-free game. I think that was an isolated incident, a one-off."
