The film has been criticized by the Clough family as they state it was not an accurate portrayal of events.
The scenes in the film set at the Derby County training ground were actually filmed in Leeds at a football pitch ironically overlooking the Leeds United stadium.
The Austin Mitchell interview with Brian Clough and Don Revie, which this film recreates, was in Leeds at the Calendar Studio on 13 September 1974.
Saltergate, Chesterfield was used to film Baseball Ground and Wembley scenes.
Martin Compston who plays John O'Hare was actually a professional footballer in Scotland, prior to getting into acting. He made two first-team appearances in the 2001-02 season for Greenock Morton in the Scottish Second Division. In both matches he appeared as a substitute and they lost 4-0, to both Alloa Athletic and Queen of the South.