Police have urged anyone planning to cause trouble surrounding the Southampton v Portsmouth derby match to stay away.
The two south coast rivals meet for their first league match in 13 years on Sunday, with a history of violent clashes between fans at previous games.
Managed travel arrangements have been put in place meaning all Portsmouth fans wanting to attend the match will have to travel to and from St Mary's on specially-organised coaches.
Assistant Chief Constable Tony Rowlinson admitted "passions are going to be high" ahead of the match.
The fixture, scheduled for 12:00 BST on Sunday, will be the first league match between the sides at St Mary's since 2012.