Seluk was speaking specifically about Guardiola's choice to omit Toure from his Champions League squad.
"They will lose a lot of millions of supporters from Africa because of this decision from Guardiola," Seluk said ahead of this weekend's Manchester derby.
"Now they will support Manchester United. A lot of people in Africa say they will never see any more matches of City on TV."
United currently house Toure's fellow Ivory Coast star Eric Bailly who has impressed in his first few matches for the Red Devils and is beginning to create quite a following of his own.