DeVere, who represented Australia in the U20 World Cup in Egypt last year and is considered one of the best young defenders in the A-League, had a day to forget against Victory and could be held accountable for two of Melbourne's three second-half goals.

Postecoglou does not want DeVere to forget what went wrong and instead use it as an education to continue to improve himself.

"Hopefully he remembers it," said Postecoglou. "It's part of his development. He's only a 20-year-old centre back.

"We've got high hopes for him. He sets his sights high. As a footballer as you go through your journey. Every time you have a little setback, it is how you react to it. I'm sure he'll learn from that."

Brisbane were looking relatively comfortable at 0-0 just after half time when DeVere played a pass across goal. But instead of finding his team-mate, Melbourne veteran Tom Pondeljak seized his chance, collecting the ball before finishing well to give Melbourne the edge.

While unhappy about the execution of the pass, Postecoglou said he had no problems with such a risky manoeuvre, saying it was the way Brisbane wanted to play.

"The first goal we conceded, while it came from Luke's missed pass, I'll defend that to the day I die. That's the football we want to play," he said.

"That was a mistake out of player trying to play out from the back, which we are trying to do. I've got no issue with Luke playing that sort of pass."

However, there was no such level of forgiveness for the second goal, where DeVere was initially nutmegged by Brazilian striker and then as he tried to shepherd the ball back to keeper Michael Theoklitos, allowed Ricardinho to dive between his legs and score a remarkable goal.

"I think probably the second goal was the one where he and Michael needed to be little more desperate in the final third," Postecoglou said.

Prior to Sunday, Brisbane had been the league's best defensive side, failing to concede a goal thanks largely to DeVere's good work.

Now instead of focussing on the strength of the defence, the attention has turned to a lack of potency up the other end, with just two goals in five games. But Postecoglou is adamant Roar's approach will yield scoring chances.

"I've certainly got no concerns. People can keep throwing it at me but I've got no concerns about that department," Postecoglou said when asked about the goal drought.

"We played the kind of football I wanted. I'm sure the goals will come when the time's right. We are a work in progress and we'll keep getting better and keep working on the things we need to work on.

"But I think every result we've had we've deserved, including today. If you look at the first four results, nobody is going to tell me that we got any cheap results."