Sydney coach Vitezslav Lavicka lauded the character of the A-League's new comeback kings and Gold Coat counterpart Miron Bleiberg questioned the refereeing after a five-goal A-League thriller at Sydney Football Stadium on Sunday.

Sydney came from behind for the third straight week, overturning a 0-2 deficit to win 3-2 with a last gasp stoppage-time penalty shot by Karol Kisel.

United looked set for their first away win of the season when they went 2-0 up within a minute of the break.

Dylan Macallister pounced on a Peter Jungschlager through ball to double the lead earned by a 22nd minute header from Kristian Rees in his 100th A-league appearance.

Halftime substitute Bruno Cazarine clawed back one goal with a bullet header on the hour before Sydney playmaker Nicky Carle drilled home an equaliser from close range three minutes later to notch his third goal in as many games.