Tickets warning for East Midlands derby fans
Fans without tickets are being urged not to travel to Wednesday's East Midlands derby match.
Police said the game at Nottingham's City Ground was sold out for both Forest and Derby County fans.
The Nottingham force said it would not tolerate any trouble before, during or after the game.
There were a small number of arrests when the two teams last met in January 2010, but police said the majority of fans were well behaved.
About 100 officers, from Nottinghamshire, Derbyshire and British Transport Police, will be on duty for the match.
Supt Mark Holland, police commander for the game, said: "During last season's two games, the vast majority of the fans were extremely well-behaved and we expect the same kind of conduct on Wednesday.
"There will be a proportionate police presence to allow fans with tickets to travel to and from the ground safely and enjoy the game.
"Any fans that have not got a ticket should simply not travel to the match, and my officers and police spotters from Derbyshire will concentrate their efforts on identifying anyone travelling without a ticket."