Manchester United legend Gary Neville fears the latest race row erupting in English football risks creating huge divisions.
Both Rio and Anton Ferdinand, Joleon Lescott and Jason Roberts were amongst those to snub the 'Kick It Out' campaign over worries that not enough action is being taken against prejudice, following two high-profile race rows last term.
And Neville is worried that if tensions over the issue are allowed to remain, the ability of football chiefs to work on the game's problems risk being handicapped.
"Football has made huge strides forwards on all social issues. PFA, make sure the first bricks of a Berlin Wall haven't been laid this weekend," he wrote on Twitter.