AC Milan supporters group Curva Sud Milano have urged the club to reject the appointment of Clarence Seedorf to replace Massimilano Allegri.
Milan fans want Allegri kept on.
A statement on curvasudmilano.it read: "The careful management of coach Allegri, who we recognise as the driving force behind the project, allowed us to climb from second-bottom to third place with only one high-profile addition - Mario Balotelli in January.
"Today we find ourselves at the beginning of a project which could soon be dismantled because of the president's choices.
"We understand that he who has made investments can decide to change coaches for personal reasons, but you must start a new project with a recognised coach and not someone like Seedorf who has no experience ahead of an engagement as difficult as the Champions League qualifying rounds."