A new trophy carrying the name of legendary manager Brian Clough will be played for between the two east midlands clubs where he made his mark.
Derby County and Nottingham Forest will compete for the Brian Clough Trophy for the first time at Pride Park Stadium on Tuesday July 31.
The competitive game - which could raise a six-figure sum for east midlands charities - will form a key part of both clubs' first team preparations for the 2007/08 season.
Special guests will include members of the European Cup winning sides Brian managed at Forest and his 1972 Derby County championship side.
The trophy will be presented to the winning club by the great man's widow Barbara, who said: "Brian would have thoroughly approved of this trophy, to be played between two clubs he loved so much.
"It is a brilliant idea to harness the healthy rivalry of both sets of fans into an occasion that benefits local charities."
Derby County, Forest and the Brian Clough Memorial Fund will nominate charities to benefit from all the profits from the game.
Any future match between the two clubs - be it league, cup or friendly - will automatically become a Brian Clough Trophy game, with the cup going to the winning club. In the event of a draw, the trophy will be retained by the club in possession.
The July 31 game, for which tickets will be priced £10 adults, £5 seniors and £2 under 16s, kicks off at 7.45pm and will be decided, if necessary, on penalties.
Brian Clough's name lives on not just in the hearts and minds of Rams and Forest fans, but in the A52 road that links the cities of Derby and Nottingham - named "Brian Clough Way" after his death in 2004.
No other individual has become a hero of both the Derby and Nottingham public - a feat that reflects his incredible achievements at clubs he took on in the doldrums and catapulted to fantastic success.
Details of the Brian Clough Trophy were agreed and finalised at a meeting on Tuesday attended by Barbara Clough, son Nigel and officials from Derby County and Nottingham Forest.
Tickets are available for Derby County supporters, initially to 2007/08 season ticket holders only, from 9am this Friday, July 6, through the usual channels.
Tickets for Nottingham Forest supporters will be available shortly. Fans are asked to keep an eye on the website, www.nottinghamforest.co.uk and the local media for further details.
Derby County ticket details can be found via Tickets>Match Details at www.dcfc.co.uk.