Millwall manager Neil Harris has urged supporters not to mar Sunday's FA Cup quarterfinal at Tottenham Hotspur with hooliganism.
The League One side, who have beaten Bournemouth, Watford and Leicester City en route to the last eight, have sold out their away allocation of 3,681 but both clubs expect a large number of ticketless Millwall supporters to come to North London.
The clubs' last meeting, a friendly in 2001, was marred by violent clashes between supporters before and after the game, and police have categorised Sunday's match as "high-risk," while they are continuing to hunt for supporters involved in disorder in Millwall's last-round win against Leicester.