Beleagured Sydney FC coach Frank Farina should approach his club if he wants dugouts installed to enhance security, says Football Federation Australia.

Farina made the call for sideline dugouts after having contents of a cup tossed on him during Saturday's tumultuous 3-0 home loss to Adelaide at Allianz Stadium.

Frank Farina. Credit:Getty Images

It was one of a number of acts of dissatisfaction from disgruntled Sydney FC fans, as their side slipped to a club record third straight home defeat and a seventh loss in their past 10 games.

The club has another home game looming on Saturday against Perth Glory, which could prompt a review of security arrangements in the wake of ugly scenes.