The league leaders extended their unbeaten streak to 21 games despite being outplayed by the home side but Postecoglou felt the performance was strong and praised his players for doing their best for the state of Queensland.
Recently, floods have badly damaged areas of the state, leaving people homeless and out of business and Postecoglou said the team played in the honour of those in distress.
"Tonight it was important to try and give the people of Queensland something to cheer about," Postecoglou said after the match.
"We spoke about it before the game, we wanted to represent the city and the state and put in a massive effort.
"The boys never give in."