The key factors that could decide the match include: - Experience: Sydney FC have more experience in big matches than Western United. This could give them a slight edge. - Form: Both teams are in good form, but Sydney FC have a slightly better record. - Key players: The performances of key players such as Trent Buhagiar, Joe Lolley, Besart Berisha and Alessandro Diamanti could be decisive. - Tactics: The way that both teams approach the match tactically could also be important.