Lavicka was disappointed at his team's continuing inability to retrieve a situation after going behind with Sunday's 2-0 defeat in Perth the latest example.

However the coach believes his side will respond in style when they host New South Wales rivals Newcastle Jets at the SFS on Sunday.

"Every good team is able to show character when they lose a game," Lavicka said. "Now we have the chance to do that next week.

"You have a look at our change room, every player is disappointed of course, but we need to pick up our confidence and show ourselves that we are a team that's able to play well next game.

"Against Newcastle, I trust the players we pick will play better than today."

And Lavicka backed Aloisi to return to his best form, despite the striker missing two late chances to continue a barren run against the Perth side.

In December last year, Aloisi endured one of the toughest days of his glittering career as nothing fell for him in a 4-1 home defeat against Perth, culminating in the marquee man falling into the foetal position in the Glory goal after missing a sitter.

This weekend he came on as a substitute with the score already at 1-0 after Scott Bulloch had given Perth a 57th-minute lead.

But Aloisi saw a difficult glancing header go wide of the upright before missing a gilt-edged chance in the 84th minute.

Glory stopper Tando Velaphi had gone to ground after colliding with team-mate Andy Todd and the ball fell perfectly for Aloisi to volley into an unguarded goal.

But the Socceroo fired over the bar, allowing Glory to take the ball up the other end four minutes later, with Jelic sealing the result.

Aloisi hasn't started in the team since returning from injury in round 10, but Lavicka said the striker was fully fit and he expected big things from him over the rest of the season.

"Johnny is an important player for us," Lavicka said. "He's experienced but his problem is, (he's) a little bit fragile with injury.

"He (had to) start again from the bottom and it's difficult but he is a good guy and he's able to help us in the next few games of the season."