Things actually started well for Sydney FC as they opened the scoring just 11 minutes in through an Alessandro Del Piero free-kick as he hit his free-kick over the wall leaving Michael Theo stretching but unable to get there.
That lead only lasted nine minutes as Brisbane Roar were back on level terms Luke Brattan was able to send a through ball that split the Sydney FC defense allowing Thomas Broich through and setting him up for an easy finish to make it 1-1.
Brisbane quickly hit the lead as Henrique terrorized Sydney down the right and Seb Ryall couldn't deal with it hacking down Henrique as he entered the box for a penalty.
That allowed Dimitri Petratos, formerly of Sydney FC, to step up and net the penalty only for the referee to order a retake that Petratos was able to make no mistake and net that one as well despite the disruption.
In the 35th minute they made it 3-1 as Matt McKay and Broich linked up very well to stump the Sydney FC defense, allowing Broich to find Petratos who hit a powerful strike to seal his brace.
Brisbane Roar just toyed with Sydney throughout the second half as they held the ball with Sydney FC unable to really create many chances.
The visitors were able to create chances but they really didn't put those chances away until late on in the half when they really made Sydney pay for their poor play.
In the 78th minute Petratos really rubbed it in to his former club as he wrapped up his hat-trick with another good goal to give his club a three goal lead.
Three minutes in to stoppage time the humiliation was complete as Ivan Franjic was able to bang in a fifth for the roar, putting them four goals up.
Sydney FC did give their fans something to cheer about as they responded from the kick-off and found a goal as Richie Garcia was able to get a goal of his own, but the damage was done and the celebrations were muted as Sydney still fell to another loss.