The head of Sydney FC's official supporters group The Cove will hand back his membership on Monday morning in protest at the current administration and said an apology from the chief executive and chairman issued on Sunday may not be enough to repair the fractured relationship between supporters and the club.

Relations between Sydney FC and The Cove hit rock bottom on Sunday after fans revolted during Saturday night's 3-0 loss to Adelaide, a result which means Sydney have now taken four points from a possible 24 in their last eight games.

After fans unveiled banners calling for the removal of coach Frank Farina, CEO Tony Pignata and chairman Scott Barlow at kick-off, some were ejected from the ground by security, prompting an exodus of home supporters, who staged an impromptu protest outside the ground.

Senior Cove figures vowed not to attend games until a new administration is brought in. ''I will not go back to the stadium, not with the current management,'' said Brendan Slowey, leader or ''capo'' of The Cove. ''I've been the capo for around five or six years and I will go to away games, but I will not put another dollar into [the owner's] pocket.''