Manchester City and Liverpool's chief executives have taken the unusual step of issuing a joint letter to supporters of both clubs ahead of Thursday's Carabao Cup fourth round tie.
The letter, which has been seen by Mirror Football, calls on fans of both sides to root out the "unacceptable behaviour" which has blighted recent meetings between the pair, and is signed by City chief Ferran Soriano and Liverpool CEO Billy Hogan.
In the most recent meeting between the pair at Anfield in October, City fans were criticised by Liverpool for singing songs referencing the Hillsborough disaster, visiting manager Pep Guardiola claimed that he was hit by a coin thrown from the Anfield stands and City's team bus suffered damage as the team left the stadium following their 1-0 defeat.
